Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: What is Prez's full name? Passage:Sydnor and Herc watch as Marlo meets with his lieutenants. Marlo makes a phone call about picking up a "skinny girl from New York," which Herc interprets as an arrangement to pick up a supply of cocaine. Herc follows Marlo to Penn Station and has him arrested when he meets a woman who turns out to not be carrying drugs. Marlo has engineered the incident to draw out the police. Meanwhile, Greggs learns that a prisoner has offered information on the dead state's witness. However, Rawls tells Landsman to detail Greggs and Norris to uniformed duty at the polls, stalling the witness case until after the election. At school, Prez offers to help Dukie get clean clothes. Donnelly and Grace remove Namond from regular class and put him in Colvin and Parenti's study program along with nine other students. When Randy is brought to Donnelly concerning a potential sexual assault case with a female student, he reveals that he knows about a murder. Later, Prez appeals to Donnelly to let him hand Randy's confession on to someone that he trusts in the police.


a