Classifier Instance:

Anchor text: 13th Amendment
Target Entity: Thirteenth_Amendment_to_the_United_States_Constitution
Preceding Context: The first legal challenge came in 1970. Backed by the MLBPA, St. Louis Cardinals outfielder Curt Flood took the leagues to court to negate a player trade, citing the
Succeeding Context: and antitrust legislation. In 1972 he finally lost his case in the United States Supreme Court by a vote of 5 to 3, but gained large-scale public sympathy, and the damage had been done. The reserve clause survived, but it had been irrevocably weakened. In 1975 Andy Messersmith of the Dodgers and Dave McNally of the Montreal Expos played without contracts, and then declared themselves free agents in response to an arbitrator's ruling. Handcuffed by concessions made in the Flood case, the owners had no choice but to accept the collective bargaining package offered by the MLBPA, and the reserve clause was effectively ended, to be replaced by the current system of free-agency and arbitration.
Paragraph Title: Players assert themselves
Source Page: History of baseball in the United States

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