Assertion: submachine gun | /r/HasProperty | invented by john t. thompson
Facets:
value: in 1918
type: TEMPORAL
value: during world war i
type: TEMPORAL
Source sentences:
text: The Thompson submachine gun is an American submachine gun first invented by John T. Thompson in 1918 during World War I and became infamous during the Prohibition era, being a signature weapon of various organized crime syndicates in the United States.