noun_chunks with "one" as root noun

[thedataist]

For sentences containing noun phrases where the root noun is "one", e.g. "I want the really expensive one", doc.noun_chunks does not currently return the noun chunk containing "one". This is probably an issue with the english models, as "one" is returned tagged as CD/NUM (cardinal number) and it should likely be NN/NOUN in this case (slightly ambiguous), but could also be handled with a special case in the syntax_iterators noun_chunks code where "one" (or any cardinal number) is allowed to appear in the root noun slot.

• spaCy version: 2.0.9
• Platform: Darwin-17.4.0-x86_64-i386-64bit
• Python version: 3.6.1
• Models: en_core_web_md, en

[ines]

The noun chunks depend on the part-of-speech tags and dependency parse, so yes, this issue likely comes down to incorrect predictions made by the tagger or parser.

I'm merging this with #3052. We've now added a master thread for incorrect predictions and related reports – see the issue for more details.

[lock]

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