Assertion: crampon's use | /r/HasProperty | apparent
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Source sentences:
text: The use of superior 12-point crampons was apparent during the 1938 first ascent of the Eiger Nordwand when German climbers Anderl Heckmair and Ludwig Vörg quickly overtook the slower, step-cutting Austrian team of Heinrich Harrer and Fritz Kasparek, who wore 10-point crampons (the four teamed up to make the complete first ascent).