Assertion: skater's foot | /r/HasProperty | the salchow
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Source sentences:
text: It’s no longer enough for male figure skaters to have honed a single quad; Nathan does four different quads of varying difficulty: three that use the toe pick—one where he switches direction upon jumping (the Lutz) and two (the toe loop and flip jump) where he spins similarly but launches from different feet (the toe loop and flip jump)—and one where he takes off from the inside of his left skate and lands on his right foot (the Salchow).