Assertion: major tranquilizer | /r/HasProperty | developed in early 1950s
Facets:
value: very
type: DEGREE
Source sentences:
text: The major tranquilizers were developed in the very early 1950s when the scientists discovered that organic compounds are known as phenothiazine which had a strong sedative effect and it helps to calm and relax the person who is taking it.
text: The major tranquilizers were first developed in the very early 1950s when scientists discovered that the organic compound called phenothiazine (pronounced fee-no-THY-uh-zeen) had a strong sedative effect, meaning it calmed or relaxed the person taking it.