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Adjunction on PRO

Adjunction on PRO, which would yield the ungrammatical ((210)) is blocked.
(209)0(209
(210)
*I want [[PRO [who Muriel likes] to read a book]]. 

This is done by specifying the <case> feature of NPf to be nom/acc. The <case> feature of PRO is null. This leads to a feature clash and blocks adjunction of relative clauses on to PRO.


XTAG Project
1998-09-14