Assertion: oil spill | /r/CapableOf | kill 13,000 birds
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Source sentences:
text: A 1998 oil spill of more than 100,000 liters in the North Sea had killed 13,000 birds inWattenmeer national park, and the scientist had learned that cleaning oil-soaked birds could be as harmful to their immune systems as the oil accumulating in their livers and kidneys.