Assertion: glider | /r/CapableOf | reach an altitude of 15,447 m
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Source sentences:
text: Ridge lift rarely allows pilots to climb much higher than about 600 m (2,000 ft) above the terrain; thermals, depending on the climate and terrain, can allow climbs in excess of 3,000 m (10,000 ft) in flat country and much higher above mountains; wave lift has allowed a glider to reach an altitude of 15,447 m (50,671 ft).