I would like to thank everybody who has helped me during the compilation of this thesis. First and foremost I would like to thank Andreas Mauthe for his invaluable contributions to my research. I could not have asked for a more insightful and dedicated supervisor, who always found time to help regardless of his own workload. I realise this is a rare characteristic and I consider myself very lucky to have worked with him. In addition, I would also like to thank a number of other people who have made a range of immeasurable contributions to my work over the years: Sebastian Kaune, Yehia El-khatib, Paul Grace, Thomas Plagemann, Gordon Blair, Magnus Skjegstad, Rubén Cuevas Rumín, as well as everybody from the CONTENT and INTERSECTION projects. It was a privilege to work with you all. Alongside these people, I would also like to acknowledge David Hutchison, Edmundo Monteiro and Michael Luck for making a number of helpful suggestions regarding the final version of this thesis. I would also like to thank everybody at Infolab21 and Lancaster University who made my time here so enjoyable, including Ali, Andi, Andreas, Andy, Colin
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