Assertion: sandman | /r/HasProperty | featured in both his guises
Facets:
value: at the peak of his popularity
type: TEMPORAL
Source sentences:
text: At the peak of his popularity, the Sandman was featured (in both his guises) in comics such as World’s Finest, World’s Fair, and as a member of the Justice Society of America, in All Star Comics; it was the latter group that would prove to be his savior.