Assertion: speed skate's blade | /r/CapableOf | do certain jumps
Facets:
Source sentences:
text: The main developments in the figure skate after 1900 were the addition of the toe pick, a group of sawlike teeth located at the toe of the blade, which enabled skaters to obtain better purchase in the ice when doing certain jumps, and the innovation of the “closed-toe” blade of one-piece steel, which added strength to the skate and permitted a much lighter-weight blade.