Assertion: skater | /r/CapableOf | rotate their hips
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Source sentences:
text: Roller skating also traditionally emphasizes spins that are uncommon on ice, especially the inverted camel in which the skater is on an outside edge standing on the right foot with their body and left leg extended outward parallel to the floor, the skater then rotates their hips 180 degrees while continuing to spin so that they are spinning upside down