Assertion: pyramid | /r/CapableOf | remain for practically 4,000 years
Facets:
value: at 481 feet
type: OTHER
Source sentences:
text: Yes, it is impressive to know that Khufu's monument was built from 2.3 million stone blocks, each weighing on average more than two tons and cut using nothing more than copper tools; to realize that its sides are precisely aligned to the cardinal points of the compass and differ one from another in length by no more than two inches, and to calculate that, at 481 feet, the pyramid remained the tallest man-made structure in the world for practically 4,000 years—until the main spire of Lincoln Cathedral was completed in about 1400 A.D.