Task: Question Answering
Input (English): Passage: In a room at a university campus in 1970, white and black students argue about an impending student strike. Mark leaves the meeting after saying he is "willing to die, but not of boredom" for the cause, which draws criticism from the young white radicals. Following a mass arrest at the campus protest, Mark visits a police station hoping to bail his roommate out of jail. He is told to wait but goes to the lock-up area, asks further about bail for his roommate, is rebuffed, calls out to the arrested students and faculty and is arrested. He gives his name as Karl Marx, which a duty officer types as "Carl Marx". After he is released from jail, Mark and another friend buy firearms from a Los Angeles gun shop, saying they need them for "self-defense" to "protect our women."
In a downtown Los Angeles office building, successful real estate executive Lee Allen reviews a television commercial for Sunny Dunes, a new resort-like real estate development in the desert. Instead of actors or models, the slickly produced commercial features casually dressed, smiling mannequins. In the next scene Allen talks with his associate about the greater Los Angeles area's very rapid growth as the two drive through crowded streets.
Mark goes to a bloody campus confrontation between students and police. Some students are tear-gassed and at least one is shot. As Mark reaches for a gun in his boot, a Los Angeles policeman is seen being fatally shot, although it is unclear by whom. Mark flees the campus and rides a city bus to suburban Hawthorne where, after failing to buy a sandwich on credit from a local blue-collar delicatessen, he walks to Hawthorne Municipal Airport, steals a small Cessna 210 aircraft and flies into the desert. 
Question: What is the real first name of the person whose roommate needed to be bailed out of jail?
Output (English): Mark.