Assertion: gelatin's protein | /r/AtLocation | animal skin
Facets:
Source sentences:
text: Derived from collagen, a protein found in animal skin and bone, it is extracted by boiling animal hides, skins, bones, and tissue after alkali or acid pretreatment.
text: Vegans and vegetarians should be aware that gelatin is produced from animal-based proteins, specifically collagen, a protein found in meats, bones and animal skins.