Assertion: woolly mammoth's extinction | /r/HasProperty | major puzzle
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Source sentences:
text: Harold Clark64 recognised that the extinction of the mammoths in Siberia was a major puzzle that needed a creationist explanation: ‘One of the most perplexing phenomena of geology is that of the so-called “frozen mammoths” of Siberia.
text: Harold Clark64 recognised that the extinction of the mammoths in Siberia was a major puzzle that needed a creationist explanation: ‘One of the most perplexing phenomena of geology is that of the so-called “frozen mammoths” of Siberia.