Assertion: skateboarder's foot | /r/AtLocation | the board
Facets:
value: on the truck
type: LOCATION
Source sentences:
text: Flipping the board by using one foot that is under the board and flipping it in the kickflip or heelflip direction—this trick was invented by Mullen in 1992.
text: The rider catches the tail of the board with the front hand and lands with the foot which was under the board on the truck.