Assertion: dissection | /r/CapableOf | become common
Facets:
value: in college biology classes
type: LOCATION
value: in the united states
type: LOCATION
value: from the 1920s
type: TEMPORAL
Source sentences:
text: In the United States, dissection of frogs became common in college biology classes from the 1920s, and were gradually introduced at earlier stages of education.