Assertion: sport boomerang | /r/HasAspect | a 250–350 millimetres
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Source sentences:
text: Most sport boomerangs weigh between 70 and 110 grams (2.5 and 3.9 oz), have a 250–350 millimetres (9.8–13.8 in) wingspan and a 20–40 m (22–44 yd) range.