Assertion: baseball's fan | /r/HasSubevent | violent outbursts
Facets:
value: occasionally
type: DEGREE
Source sentences:
text: In periods when theatre was considered a form of mass entertainment, there were phenomena of rival fans supporting rival actors or theatrical teams, occasionally leading to violent outbursts having many similarities to present-day violence of sports fans – the Astor Place Riot in 1849 New York City being a conspicuous example.