Assertion: scientific diving | /r/HasProperty | conducted by various organizations
Facets:
value: in the 1950s
type: TEMPORAL
Source sentences:
text: In the 1950s through 1970s scientific diving in the U.S. was conducted by various organizations using similar but informal self-regulated standards.
text: In the 1950s through 1970s scientific diving in the U.S. was conducted by various organizations using similar but informal self-regulated standards.