Assertion: maple's sap | /r/HasProperty | collected
Facets:
Source sentences:
text: Buckets began to be replaced with plastic bags, which allowed people to see at a distance how much sap had been collected.
text: Sap must first be collected and boiled down to obtain pure syrup without chemical agents or preservatives.
text: Pure maple syrup is made when the sap from sugar maple trees is collected, boiled and strained until thick enough to pour on a plate of pancakes.