Assertion: cotton | /r/HasSubevent | the expansion of slavery
Facets:
value: in the united states
type: LOCATION
value: by the 1850s slaves
type: OTHER
Source sentences:
text: By the early 1830s the United States produced the majority of the world's cotton which lead to the expansion of slavery in the United States and by the 1850s slaves made up 50% of the population of the states which produced majority of cotton in US: Georgia, Alabama, Mississippi, and Louisiana.