Assertion: harrier | /r/CapableOf | have diversified with the emergence of c4 grasses
Facets:
value: during the late miocene
type: TEMPORAL
value: during pliocene
type: TEMPORAL
Source sentences:
text: The harriers are thought to have diversified with the expansion of grasslands and the emergence of C4 grasses about 6 to 8 million years ago during the Late Miocene and Pliocene.