Assertion: friction | /r/HasProperty | necessary
Facets:
value: in many applications
type: LOCATION
value: in some cases
type: TEMPORAL
value: on one hand
type: OTHER
value: to perform many simple tasks
type: PURPOSE
Source sentences:
text: Friction is also necessary to perform many simple tasks in our daily lives.
text: On the other hand, friction between your pencil and your paper is necessary to allow the pencil to leave a mark.
text: While friction is necessary in some cases, it becomes nuisance in others.
text: On one hand, friction is necessary because without it a skier wouldn't be able to ski up hill or even move on flat surfaces.
text: Friction is necessary in many applications to prevent slipping or sliding.