Prepositions have tended to be overlooked in NLP applications, but there have been isolated examples of prepositions being shown to be worthy of dedicated treatment.
similarly, the emergence of resources such as the Preposition Project, and the data set made available for the semEval 2007 task on the word sense disambiguation of prepositions (Litkowski and Hargraves 2007), provide the means for more detailed analysis of preposition semantics.