Premise: Wyatt Berry Stapp Earp ( March 19 , 1848 -- January 13 , 1929 ) was an American Old West gambler , a deputy sheriff in Pima County , and deputy town marshal in Tombstone , Arizona Territory , who took part in the gunfight at the O.K. Corral , during which lawmen killed three outlaw cowboys . He is often regarded as the central figure in the shootout in Tombstone , although his brother Virgil was Tombstone city marshal and Deputy U.S. Marshal that day , and had far more experience as a sheriff , constable , marshal , and soldier in combat . In 1876 , he followed his brother James to Dodge City , Kansas , where he became an assistant city marshal .
Hypothesis: Wyatt Earp was a marshal.
Label: ENTAILMENT