The FrameNet project is building a lexical database of English that is both human- and machine-readable, based on annotating examples of how words are used in actual texts. From the student's point of view, it is a dictionary of more than 13,000 word senses, most of them with annotated examples that show the meaning and usage. For the researcher in Natural Language Processing, the more than 200,000 manually annotated sentences linked to more than 1,200 semantic frames provide a unique training dataset for semantic role labeling, used in applications such as information extraction, machine translation, event recognition, sentiment analysis, etc. For students and teachers of linguistics it serves as a valence dictionary, with uniquely detailed evidence for the combinatorial properties of a core set of the English vocabulary. The project has been in operation at the International Computer Science Institute in Berkeley since 1997, supported primarily by the National Science Foundation, and the data is freely available for download. It has been downloaded and used by researchers around the world for a wide variety of purposes (see FrameNet downloaders). FrameNet-like databases have been built for a number of languages (see FrameNets in other languages) and a new project is working on aligning the FrameNets across languages.
More detailed description at What is FrameNet?