Assertion: speculator | /r/CapableOf | corner the market
Facets:
value: in the mid-1950s
type: TEMPORAL
value: successfully
type: MANNER
Source sentences:
text: The Onion Futures Act bans the trading of futures contracts on onions in the United States, after speculators successfully cornered the market in the mid-1950s; it remains in effect as of 2013 .