[kamkha]

spaCy's 96.8% accuracy is for the task of POS tagging while Google's reported 94% accuracy is for dependency parsing, a significantly harder problem.

[weinzierl]

Thanks (also to charlieegan3) this explains the difference nicely.

Actually I found an educational 500 lines python parser from the same author as well [1]. It claims an accuracy of 92.7 for the WSJ corpus.

[1] https://spacy.io/blog/parsing-english-in-python

[xigency]

Well, it seems this page could use some work: http://www.aclweb.org/aclwiki/index.php?title=Dependency_Par...