Assertion: geophysicist | /r/CapableOf | use gravity survey
Facets:
value: to indicate the presence of rocks
type: PURPOSE
value: through accurate experiment
type: MANNER
Source sentences:
text: geophysicists use gravity survey through accurate experiment.
text: Most geophysicists use gravity surveys to indicate the presence of rocks with differing densities in areas where they can't be seen like underground.
text: Other geophysicists use gravity measurements to model the structure of the crust.