Assertion: blue headed wagtail | /r/HasProperty | a taxonomical nightmare
Facets:
value: especially
type: MANNER
value: with many more invalid ones
type: OTHER
value: always
type: DEGREE
Source sentences:
text: The blue-headed wagtail (AKA yellow wagtail and many other names), especially, has always been a taxonomical nightmare with over a dozen currently accepted subspecies and many more invalid ones.