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Re^4: Can't use an undefined value as a HASH referenceby Anonymous Monk |
| on Aug 25, 2015 at 16:32 UTC ( [id://1139881]=note: print w/replies, xml ) | Need Help?? |
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Thank you'll very much for the pointers. It helped me trace through the problem. It's now resolved. I see build_tree was expecting a string that began with parenthesis, like so: "(TOP (S (NP (NP (NNP Pierre) (NNP Vinken))".
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