Assertion: rat | /r/ObjectUse | used in many experiments
Facets:
value: over the next 30 years
type: TEMPORAL
value: in the mid 1800s
type: TEMPORAL
Source sentences:
text: Since then, rats have been used in many experiments.
text: Rats were first used for experimental purposes in the mid 1800s.
text: Over the next 30 years rats were used for several more experiments and eventually the laboratory rat became the first animal domesticated for purely scientific reasons.
text: Rats have since long been kept as laboratory animals, and used in a number of experimentations, for example
text: Since then, rats have been used in many experiments.