Assertion: polymer | /r/HasProperty | man-made
Facets:
Source sentences:
text: Some polymers are man-made.
text: Polymers are both man-made and naturally occurring.
text: Most polymers are synthetic, meaning they are man-made and have been designed by chemical engineers .
text: Some polymers are man-made.
text: Polymers may be naturally found in plants and animals (natural polymers) or may be man-made (synthetic polymers).