Assertion: petrel's habit | /r/HasSubevent | few studies
Facets:
Source sentences:
text: Its secretive habits and limited range have resulted in few studies and many aspects of the species biology are poorly known.
text: Its secretive habits, remote breeding colonies and limited range have resulted in few studies and many aspects of the species' biology are poorly known.
text: Its secretive habits and limited range have resulted in few studies and many aspects of the species biology are poorly known.