Assertion: sea sponge | /r/HasProperty | useful
Facets:
value: in studying ocean periods
type: TEMPORAL
value: to the ocean ecosystem
type: TRANSITIVE-OBJECT
value: to humans
type: TRANSITIVE-OBJECT
Source sentences:
text: They are indeed useful to the ocean ecosystem as well as to humans.
text: Other than monitoring the pH level in the ocean, a sea sponge is useful in studying ocean periods.