Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Whose return to the gang makes the Tobin's bank robbery possible? Title: Man of the West Movie plot: Link Jones (Gary Cooper) rides into Crosscut, Texas to have a bite to eat, then catch a train to Fort Worth, where he intends to use the savings of his community of Good Hope to hire a schoolteacher. On the train platform, Sam Beasley (Arthur O'Connell) speaks with Link briefly, rousing the suspicions of the town marshal, Sam being a known con man. When the marshal comments that Link looks familiar, Link gives him a false name. Aboard the train, Sam impulsively joins Link, learns of his mission in Fort Worth and claims he can be of help. Sam introduces him to the Crosscut saloon singer, Billie Ellis (Julie London), insisting she could make an ideal teacher. Their conversation is overheard by Alcutt, a shady-looking passenger. When the train stops to pick up wood for additional fuel, male passengers help load the train but Alcutt remains on board, feigning sleep. He signals three other men, Coaley Tobin (Jack Lord), Trout (Royal Dano) and Ponch (Robert J. Wilke), who rob the train. Link tries to intervene and is knocked unconscious. The train pulls away, with Alcutt riding off with Link's bag containing Good Hope's money. Alcott is wounded as he and the robbers flee. Link revives to discover that he, Sam and Billie have been left behind, many miles from the nearest town. Link leads them on foot to a ramshackle farm, admitting that he lived there years earlier. While the others wait in the barn, Link enters the run-down house and finds the train robbers hiding inside. Coaley is suspicious of Link's claim that he simply wants to rest for the night. They are interrupted by aging outlaw Dock Tobin (Lee J. Cobb), who is startled to see Link, his nephew, whom he raised as a killer and thief. Link abandoned him more than a dozen years earlier to go straight. Tobin laments that nothing has been the same since Link's departure and introduces him to the roughnecks he now commands, including Link's own cousin, Coaley. Disturbed by the revelation of Link's true identity, Coaley demonstrates his toughness by killing...
Link