Assertion: orangutan's orangutan | /r/HasProperty | observed
Facets:
Source sentences:
text: Some orangutans have even been observed using tools to extract seeds from hard-shelled fruits.
text: Two captive-born Bornean orangutans ( Pongo pygmaeus ), 29-year-old adult female Theodora (born in 1988, 2170-EAZA) and her 13-year-old daughter Tamü (born in 2004, 3164-EAZA) were observed and tested (i.e., ages when the study started).