Task: Question Answering
Input (English): Passage: Don McKay is a lonely high school janitor who one day receives a letter from his high school sweetheart, Sonny. In it, she asks him to come visit her back in their home town, because she is dying of an unnamed disease. At first he is reluctant because he had been a suspect in a murder case there years before, but Don decides to go. He arrives and gets a ride to Sonny's house by an eccentric cab driver named Samuel.
Don meets Sonny, as well as her strange caregiver Marie. Marie's coldness towards Don makes it clear that she doesn't approve of his presence. Don spends the night, and he and Sonny make love. The next morning, Sonny's Doctor, Lance Pryce visits. While Marie and Sonny are out, Pryce attacks Don, and after a struggle, Don kills the man, and hides the body in a bed of leaves behind the garden. However, Don had just suffered an allergic reaction to a bee sting, and blacks out shortly after hiding the body. He awakens in the hospital, where Sonny proposes marriage and claims that she had recently spoken to Pryce. 
Don goes to see his old friend Otis, and tells him what happened. Otis agrees to help Don get rid of the body that night, but when he arrives it has vanished. Sonny rushes out, thinking the men are burglars, and Otis runs off. After an argument, Don returns home for a few days, eventually getting another letter from Sonny asking him to come back to her. 
Question: What is the full name of the person who attacks the janitor?
Output (English): Lance Pryce.