Premise: Source: Cordilleran Ice Sheet
The ice sheet covered up to 2.5 million square kilometres at the Last Glacial Maximum and probably more than that in some previous periods , when it may have extended into the northeast extremity of Oregon and the Salmon River Mountains in Idaho .
Hypothesis: Cordilleran Ice Sheet dates back 4 million years.
Label: nei
Span interactions:
level: high
labels: Synonym
premise_text: million
hypothesis_text: million
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Synonym
Synonym
premise_text: Cordilleran Ice Sheet
hypothesis_text: Cordilleran Ice Sheet
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Synonym
premise_text: The ice sheet
hypothesis_text: Cordilleran Ice Sheet
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hypothesis_text: Cordilleran Ice Sheet
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premise_text: The ice sheet
hypothesis_text: Cordilleran Ice Sheet
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labels: Hypernym-two-way
premise_text: million
hypothesis_text: million