Assertion: weapon | /r/HasProperty | the standard
Facets:
value: since the early 1960s
type: TEMPORAL
Source sentences:
text: Some weapons tested during the 1950s used pits made with U-235 alone, or in composite with plutonium, but all-plutonium pits are the smallest in diameter and have been the standard since the early 1960s.
text: Title I weapons, or GCA firearms, are standard rifles, shotguns, and handguns.