Assertion: algae's type | /r/HasProperty | important
Facets:
value: in nutrient-poor environments
type: LOCATION
value: in some coastal regions
type: LOCATION
Source sentences:
text: Certain types produce a calcium carbonate crust around themselves, and are important in the formation of reefs in some areas.
text: Many types of seaweed are edible, and are an important food source in some coastal regions.
text: This type of symbiotic relationship is important in nutrient-poor environments.