Assertion: new aspen | /r/CapableOf | take place
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Source sentences:
text: Its current 80,000-year designation is based on a complex set of factors, including the history of its local environment, the evidence indicating that there are few if any naturally occurring new aspens in most of the western United States since a climate shift took place 10,000 years ago which eliminated favorable soil conditions for seedlings, the rate of growth (including the differences of rates in distinct climates when accounting for its local-climate history, that males grow more slowly than females, and that aspens grow more slowly at higher elevations