Assertion: surfer | /r/CapableOf | maintain balance
Facets:
value: on their boards
type: LOCATION
value: in physics terms
type: OTHER
Source sentences:
text: In physics terms, how can surfers maintain balance when they stand up on top of their boards?
text: Surfers must have strong legs, upper bodies, cores and cardiovascular systems to paddle out to sea, sustain their balance on their boards and repeat the whole process all morning.