Task: Question Generation
Input (English): Passage: In the early 1980s, teenagers Martin Asher and Matt Soulsby meet on a bus to Mont-Laurier, Quebec. Seemingly uncertain of their ultimate destination, the two talk about their plans for the future. When their bus breaks down, the two acquire a car from a nearby garage. While Martin is driving, a tire blows. Matt struggles to change the tire and Martin comments on how he and Matt are both about the same height, and kicks Matt into the path of an oncoming truck, killing both him and the driver. Taking Matt's guitar and clothes, he walks away singing in a voice similar to Matt's. 
Twenty years later, a successful FBI profiler, Illeana Scott, is summoned to help out the authorities in Montreal in apprehending a serial killer who assumes the identities of his victims,  enabling him to travel undetected across North America. Martin's mother Rebecca claims to have seen her son alive and well on a ferry to Quebec City, leading to the body believed to have belonged to him being exhumed for forensic examination, and he becomes the primary suspect. Illeana, who has difficulty adjusting to her new surroundings and is distrusted by her local colleagues, interviews art dealer James Costa, an eyewitness who saw Asher kill his last victim. Costa makes a drawing of the killer and the authorities manage to track down the man's apartment, only to find a decaying corpse chained up in the ceiling. Illeana goes to Rebecca's house to question her about her son, and while snooping around discovers a hidden passageway behind a cabinet that leads to a secret room used to house young Martin, an unwanted and unstable younger child whom Rebecca neglected and saw as inferior to her elder son, whom Martin ultimately killed out of jealousy. Illeana is attacked by a hidden assailant, who escapes before she can identify him.
Output (English): What is the last name of the person that Costa draws?