Assertion: boxing | /r/CapableOf | come out on top
Facets:
value: for toughness
type: CAUSE
Source sentences:
text: A glimpse at the ESPN rankings where boxing came out on top for toughness
text: According to the ESPN Degree of Difficulty Project, which sized up more than 60 sports based on required athletic skills to determine which sport is most difficult, boxing came out on top.