Assertion: bracken | /r/HasAspect | some part
Facets:
Source sentences:
text: Bracken has been shown to be carcinogenic in some animals and some have suggested it could have some part in causing the high incidence of stomach cancer in Japan.
text: Bracken has been shown to be carcinogenic in some animals and some have suggested it could have some part in causing the high incidence[citation needed] of stomach cancer in Japan.