Assertion: chinese hamster | /r/ObjectUse | used laboratory animals
Facets:
value: in the past
type: TEMPORAL
value: commonly
type: TEMPORAL
Source sentences:
text: In the past, Chinese hamsters were commonly used laboratory animals, until they were replaced by the common mouse and rat, which are easier to keep and breed; however, several biotech drugs are still being produced by putting the gene for the protein into Chinese hamster ovary cells, which then produce the protein.
text: They are often kept as pets and in the past have been used as laboratory animals.