Assertion: batman's character | /r/CapableOf | become in late 1950s
Facets:
value: before returning to his darker roots
type: TEMPORAL
Source sentences:
text: Introduced as a psychopath with a warped, sadistic sense of humor; the character became a goofy prankster in the late 1950s in response to regulation by the Comics Code Authority, before returning to his darker roots during the early 1970s.