Assertion: heath's population | /r/CapableOf | begin its final decline
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Source sentences:
text: However, a destructive fire during the 1916 nesting season, severe winters, an unusual influx of predatory northern goshawks, inbreeding, an excess number of male individuals and apparently an epidemic of blackhead disease (which might have been transmitted by poultry) brought the numbers down quickly; after a last recovery to 600 in 1920, the population began its final decline.
text: However, a destructive fire during the 1916 nesting season, severe winters, inbreeding, an excess number of male individuals and apparently an epidemic of blackhead disease which might have been transmitted by poultry brought the numbers down quickly; after a last recovery to 600 in 1920, the population began its final decline.