Task: Question Generation
Input (English): Passage: Oliver Hardy and Stan Laurel are vagabonds being chased by the police. They hide in the cellar of the mansion of a Quatermain-esque adventurer, Colonel Wilburforce Buckshot, who departs for a safari in South Africa. The mansion is to be rented out until his return, but the staff sneak off for a holiday, leaving the house empty. The boys are surrounded by police and have to deceive a honeymooning couple wanting to rent the house. Ollie disguises himself as Buckshot and Stan disguises himself as both butler Hives and chambermaid Agnes.
During a girl-talk scene with Thelma Todd and Stan (disguised as Agnes), Stan's comments get sillier and sillier. The real Colonel returns to fetch his bow and arrows, to find the disorder that had ensued after his departure. Ollie continues his masquerade as Colonel Buckshot to the real colonel, until he sees the portrait on the wall of the real owner. Stan and Ollie escape the ensuing row dressed as a wildebeest on a stolen tandem bicycle. They ride into a railroad tunnel and encounter a train, but emerge riding unicycles.
Output (English): What is the second type of bicycle the vagabonds use?