Assertion: swan | /r/HasAspect | average length of 40 inches
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Source sentences:
text: Swans are unusually large waterfowl, with the smallest swan species, the coscoroba swan, still having an average length of 40 inches (101 cm), a wingspan of 60 inches (152 cm), and a weight of 8-12 pounds (3.6-5.4 kg).