Assertion: aqueduct's channel | /r/MadeOf | earth
Facets:
Source sentences:
text: In the past, aqueducts often had channels made of earth or other porous materials but significant amounts of water are lost through such unlined aqueducts.
text: In the past, aqueducts often had channels made of earth or other porous materials but significant amounts of water are lost through such unlined aqueducts.
text: In the past, aqueducts often had channels made of earth or other porous materials but significant amounts of water are lost through such unlined aqueducts.
text: In the past, aqueducts often had channels made of earth or other porous materials but significant amounts of water are lost through such unlined aqueducts.