Assertion: collagen | /r/HasProperty | a building block
Facets:
value: for tendons
type: PURPOSE
value: for bones
type: PURPOSE
value: for skin
type: PURPOSE
Source sentences:
text: Did you know that aside from water, collagen is the most plentiful substance in our bodies and is a building block for skin, tendons, and bones?
text: Collagen is the building block for many parts of the body, including skin, bones, and tendons.