Assertion: hamstring | /r/CapableOf | line the semitendinosus
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Source sentences:
text: The hamstrings are a group of muscles that line the back of your thigh, including the semitendinosus, semimembranosus and the long and short heads of the biceps femoris muscles, originating from your ischial tuberosity, known informally as your 'sit bones'.