Assertion: nuclear weapon | /r/HasProperty | developed by the soviet union
Facets:
value: after world war ii
type: TEMPORAL
Source sentences:
text: After World War II, nuclear weapons were also developed by the Soviet Union (1949), the United Kingdom (1952), France (1960), and the People's Republic of China (1964), which contributed to the state of conflict and extreme tension that became known as the Cold War.