Assertion: coral | /r/CapableOf | shelter the zooxanthellae
Facets:
value: in return
type: PURPOSE
value: as an example of mutualism
type: PURPOSE
Source sentences:
text: In return, as an example of mutualism, the corals shelter the zooxanthellae, averaging one million for every cubic centimeter of coral, and provide a constant supply of the carbon dioxide they need for photosynthesis.