This page allows you to run text through the English USAS (UCREL Semantic Analysis System) semantic tagger. More information about the USAS tagger including papers describing its creation, evaluation and applications are on the USAS web page. The USAS English tagger is also available through Wmatrix.
This free service is not intended for extremely large numbers of repeated submissions from the same site. Please contact Paul Rayson (email: firstname.lastname@example.org), also use this address if you have technical problems.