Hello,
The PoS tagger does not seem to take into account the presence of possesive ending ('s)
blob = "John's big idea isn't all that bad."
text = Text(blob)
text.pos_tags
[(u"John's", u'NUM'), (u'big', u'ADJ'), (u'idea', u'NOUN'), (u"isn't", u'CONJ'), (u'all', u'DET'), (u'that', u'DET'), (u'bad', u'ADJ'), (u'.', u'PUNCT')]
John is a Proper Noun and "'s" is a possesive marker that should have been marked accordingly.
Hello, The PoS tagger does not seem to take into account the presence of possesive ending ('s)