Assertion: backpack | /r/AtLocation | use
Facets:
value: for alpine recreation
type: PURPOSE
value: primarily
type: DEGREE
value: for camping
type: PURPOSE
value: for hiking
type: PURPOSE
Source sentences:
text: In 1938, when Gerry Outdoors invented the first backpack with a zipper, backpacks were still primarily in use for hiking, camping and alpine recreation.