nonreferential np english number lgs roviana yup ik eskimo two encountered nonreferential np phonologically morphologically syntactically incorporated vrb verb phrase verb group similar structural clues could used identify nonreferential np english interest identifying nonreferential np written english computer natural lg processing system would know set referents serve antecedents subsequent anaphora resolution compounds e g duckshooting season suppose treated superficially single words things like lose faith catch sight course criteria involve larger discourse issues may possible identify least nonreferential np cheaply e looking within clause considering inherent lexical semantics summarize post replies list regards simon corston