Categorial Grammar

The paper is a review article comparing a number of approaches to natural language syntax and semantics that have been developed using categorial frameworks. It distinguishes two related but distinct varieties of categorial theory, one related to Natural Deduction systems and the axiomatic calculi of Lambek, and another which involves more specialized combinatory operations

Movement and Intervention Effects:Evidence from Hindi/Urdu

The purpose of this dissertation is to explore the nature of intervention effects seen in various constructions like Wh-scope marking, raising and passivization. In particular, this dissertation argues in favor of a movement account for all these cases and supports the idea that (syntactic) movement is inevitable and sufficient enough to provide a unified account of various structural relations (Hornstein, 2009). It further argues that movement always happens in narrow syntax, even when it isn't visible. For some of these invisible cases, this dissertation suggests head movement as an alternative to LF movement and Agree. The second aim of this dissertation is to explain intervention effects in terms of relativized minimality (Rizzi 1990, 2004). In this consideration, this dissertation sides with Boeckx & Lasnik (2006) view that not all minimality violations are derivational: some are repairable, indicating that they must be treated as representational constraints, while others are not, indicating that they are derivational. In this study, the dissertation not only reviews cross-linguistic facts from languages like English, German, Chinese, Japanese, and Icelandic but also provides novel empirical data from Hindi/Urdu. This way, the dissertation focuses on cross-linguistic as well as language specific investigation of intervention effects. The third aspect of this dissertation therefore is to relate cross-linguistic variations in intervention effects to the difference in the nature of the phase heads among languages. For instance, the cross-linguistic difference in the properties of various constructions (such as Wh-scope marking and double object construction) is reducible to the availability of an escape hatch with the relevant phase head (C or v). In this exploration, this dissertation also makes two language specific claims about Hindi/Urdu; (a) the basic word order in this language is SVO, and (b) this language involves Wh-movement in overt syntax. The first claim contributes to the long standing debate about the basic word in Hindi/Urdu, a language which shows a dichotomy in its word order by exhibiting both SOV and SVO word order. The second claim adds to the covert vs. overt Wh-movement debate for Wh in-situ languages like Hindi/Urdu. The dissertation attributes both these aspects to the phasehood of little v in Hindi/Urdu

Gapping as Constituent Coordination

A number of coordinate constructions in natural languages conjoin sequences which do not appear to correspond to syntactic constituents in the traditional sense. One striking instance of the phenomenon is afforded by the gapping construction of English, of which the following sentence is a simple example: (1) Harry eats beans, and Fred, potatoes Since all theories agree that coordination must in fact be an operation upon constituents, most of them have dealt with the apparent paradox presented by such constructions by supposing that such sequences as the right conjunct in the above example, Fred, potatoes, should be treated in the grammar as traditional constituents, of type S, but with pieces missing or deleted

Lexical and Grammar Resource Engineering for Runyankore & Rukiga: A Symbolic Approach

Current research in computational linguistics and natural language processing (NLP) requires the existence of language resources. Whereas these resources are available for a few well-resourced languages, there are many languages that have been neglected. Among the neglected and / or under-resourced languages are Runyankore and Rukiga (henceforth referred to as Ry/Rk). Recently, the NLP community has started to acknowledge that resources for under-resourced languages should also be given priority. Why? One reason being that as far as language typology is concerned, the few well-resourced languages do not represent the structural diversity of the remaining languages. The central focus of this thesis is about enabling the computational analysis and generation of utterances in Ry/Rk. Ry/Rk are two closely related languages spoken by about 3.4 and 2.4 million people respectively. They belong to the Nyoro-Ganda (JE10) language zone of the Great Lakes, Narrow Bantu of the Niger-Congo language family.The computational processing of these languages is achieved by formalising the grammars of these two languages using Grammatical Framework (GF) and its Resource Grammar Library (RGL). In addition to the grammar, a general-purpose computational lexicon for the two languages is developed. Although we utilise the lexicon to tremendously increase the lexical coverage of the grammars, the lexicon can be used for other NLP tasks.In this thesis a symbolic / rule-based approach is taken because the lack of adequate languages resources makes the use of data-driven NLP approaches unsuitable for these languages

Dependency, licensing, and the nature of grammatical relations

Dependency is a general term that refers to different structural relations. We highlight three very general classes of phenomena that are often captured by this term: (i) the structural relation between a lexical head (e.g., V, N, A) and the functional structure projected by it such as the relation between a verb and an auxiliary or between a noun and a determiner; (ii) the local selectional relation between a lexical head and the constituents that are combined merged with it to satisfy its argument structure, as in the case of the verb and the direct and indirect objects; (iii) the structural relation created by two different constituents that share the same referential index. In the latter case, we observe two major types: a constituent is displaced, as in the case of the subject of a passive clause or a wh-constituent; or two constituents share the same referent but have different functions in the clause (or in different clauses), as is the case of pronouns and their antecedents