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Wh-moved PP

Like NP complements, PP complements can be extracted to form wh-questions, as in sentence ((152)).
(151)0(151
(152)
[To which dog]i did Beth Ann throw the frisbee $\epsilon_{i}$? 

As can be seen in the tree in Figure 13.5, extraction of PP complements is very similar to extraction of NP complements from the same positions.

   
Figure: Ditransitive with PP with PP extraction tree: $\alpha $pW2nx0Vnx1pnx2
\includegraphics[height=2.36in]{/mnt/linc/xtag/work/doc/tech-rept/ps/extraction-files/alphapW2nx0Vnx1pnx2.ps}

The PP extraction trees differ from NP extraction trees in having a PP rather than an NP left daughter node under Sq and in having the $\epsilon $ fill a PP rather than an NP position in the VP. In other respects these PP extraction structures behave like the NP extractions, including being used for topicalization.

XTAG Project
1998-09-14