Assertion: mantle | /r/CapableOf | lead american league
Facets:
value: in homers
type: OTHER
value: in runs
type: TEMPORAL
Source sentences:
text: Mantle finished with 54 home runs while leading the American league in runs scored and walks.
text: In addition to hitting 536 lifetime home runs, he led the American League in homers four times and was chosen as its most valuable player three times.