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what animal is silk made of
from what animal is silk produced
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what animals make silk
what is silk made of in china
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what animal is silk made of, from what animal is silk produced, what is made of silk, what animal does silk come from, what material is silk made of, what animals make silk, what is silk made of in china, what animals create silk, what kind of material is silk, things made of silk, animals that produce silk, what material is silk, what is in silk
