Assertion: biology | /r/HasProperty | existed as science
Facets:
value: for about 200 years
type: TEMPORAL
Source sentences:
text: It has existed as a science for about 200 years, and was preceded by natural history.
text: It has existed as a science for about 200 years, and was preceded by natural history.
text: It has existed as a science for about 200 years, and was preceded by natural history.