Assertion: silver trout | /r/HasProperty | become trapped
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Source sentences:
text: The silver trout was an exceedingly rare fish, having become trapped by changed drainage systems in two New Hampshire lakes (Dublin/Monadnock Pond and Christine Lake in Stark) that were left as successors of Lake Hitchcock, a very large glacial lake that persisted for 4000 years where the silver trout probably evolved from brook trout.