The TRIPS system here uses a wide range of statistically driven preprocessing , including part of speech tagging , constituent bracketing , inter-pretation of unknown words using WordNet , and named-entity recognition ( Allen et al 2008 ) . All these are generic off-the-shelf resources that ex-tend and help guide the deep parsing process . The TRIPS LF ( logical form ) ontology1 is de-signed to be linguistically motivated and domain independent . The semantic types and selectional restrictions are driven by linguistic considera-tions rather than requirements from reasoning components in the system ( Dzikovska et al 2003 ) .