Assertion: mastodon's bone | /r/AtLocation | the rancho la brea property
Facets:
value: for some years
type: TEMPORAL
Source sentences:
text: For some years, tar-covered bones were found on the Rancho La Brea property, but were not initially recognized as fossils because the ranch had lost various animals–including horses, cattle, dogs, and even camels–whose bones closely resemble several of the fossil species.