Hi, dear corpora members,
I am working on head annotating the Penn Tree Bank corpus.
The only headword percolation rules I could find are from C. Chelba,
1997 and M. Collins, 1999, which are the modifications of the "Magnerman
& Black Headword Percolation Rules".
I really want to know if there are some more refined and improved
headword percolation rules available.
Best Regards
Shen Yihai
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