In the past, water suppliers used most of their resources to treat water from rivers, lakes, and underground sources of drinking water before supplying it to our homes as drinking water.
(water suppliers; used; most of their resources; to treat water from rivers, lakes, and underground sources of drinking water before supplying it to our homes as drinking water; T:In the past) Context(water suppliers used,List([13, 33))):(water suppliers; used most of their resources to treat; water; from rivers, lakes, and underground sources of drinking water)
water suppliers used,List([13, 33))
water suppliers water suppliers
used used most of their resources to treat
most of their resources to treat water from rivers, lakes, and underground sources of drinking water before supplying it to our homes as drinking water T:In the past
water from rivers, lakes, and underground sources of drinking water