Assertion: amusement park's attraction | /r/CapableOf | consist riding of individual sleds
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Source sentences:
text: The origins of roller coasters can be traced back to 17th-century Russia, where gravity-driven attractions, which at first only consisted of individual sleds or carts riding freely down chutes on top of specially constructed snow slopes with piles of sand at the bottom for braking, were used as winter leisure activities.