cost of treebanking

Hello,

Would anyone happen to know of any estimates of the number of
man-hours that went into annotating the Penn Treebank (or
alternatively, the Genia Treebank)? There are some rough figures in
(Marcus, et al. 1993. Building a Large Annotated Corpus of English:
The Penn Treebank), but these seem to be hypothetical projections and
only applicable to the earlier, preliminary version of PTB.

Thanks,
Jona

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