Task: Question Generation
Input (English): Passage: Sergeant Joe Gavilan is a financially strapped homicide detective with the Hollywood Division of the LAPD. He has been moonlighting as a real estate agent for seven years. His current partner is K. C. Calden, a much younger detective who teaches yoga on the side and wants to be an actor. The partners are investigating the murders of the four members of rap group "H2OClick", who were gunned down in a nightclub by two unidentified assailants. The detectives discover there was a witness who fled, and they work to track him down. They are distracted, failing to bond as partners, as Gavilan has to deal with a looming real estate deal that may be the key to getting out of debt, while Calden further pursues his dreams of acting by trying to be scouted by talent agents.
Meanwhile, the manager of H2OClick, Antoine Sartain, has his head of security eliminate the two hitmen, who he had hired to kill H2OClick and, earlier a rapper named Klepto that Sartain also managed.
Gavilan and Calden believe the murders are gang-related, but when Calden happens to see the bodies of the hitmen at the morgue, they conclude that the murders were orchestrated. The detectives also notice similarities that tie the H2OClick and Klepto homicides together. Gavilan learns from an undercover officer that the songwriter for H2OClick, a man named K-Roc, has gone missing, leading Gavilan to believe he is their murder witness. They struggle to track down K-Roc until they finally learn his real name, Oliver Robideaux, the son of former Motown singer Olivia Robideaux.
Output (English): What nickname does the witness who fled go by?