Assertion: keep's wall | /r/HasAspect | double-thick 4 feet
Facets:
Source sentences:
text: This addition is cumulative; for example, a 20-foot tall wall of masonry has a single 2-foot thick layer for the top 10 feet and a double-thick (4 feet) layer for the lower 10 feet, while a 30-foot-tall masonry wall would be 2 feet thick at the top (one layer), 4 feet thick in the middle (two layers), and 6 feet thick at the bottom (3 layers).