Assertion: sac spider | /r/CapableOf | call two-clawed hunting spider
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text: Sac spider, (family Clubionidae), also called two-clawed hunting spider, any member of a relatively common, widespread family of spiders (order Araneida) that range in body length from 3 to 15 mm (about 0.12 to 0.6 inch) and build silken tubes under stones, in leaves, or in grass.