Assertion: american submachine gun | /r/HasProperty | invented by oscar payne
Facets:
value: during the first world war
type: TEMPORAL
Source sentences:
text: The first American submachine gun was invented by Oscar Payne, an employee of retired General John T. Thompson, again during the First World War.
text: The first American submachine gun was invented by Oscar Payne, an employee of retired General John T. Thompson, again during the First World War.