Assertion: blue whale | /r/CapableOf | weigh 180 metric tons
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Source sentences:
text: The largest accurately measured blue whale was a 29.5-metre female that weighed 180 metric tons (nearly 200 short [U.S.] tons), but there are reports of 33-metre catches that may have reached 200 metric tons.
text: They can grow up to 33 meters in length and weigh more than 180 metric tons.