Assertion: straight razor | /r/AtLocation | common use
Facets:
value: until the mid-20th century
type: TEMPORAL
Source sentences:
text: After their introduction in 1680, straight razors became the principal method of manual shaving for more than two hundred years, and remained in common use until the mid-20th century.
text: After their introduction in 1680, straight razors became the principal method of manual shaving for more than two hundred years, and remained in common use until the mid-20th century.