Task: Question Answering
Input (English): Passage: While on a holiday in Mallorca, Lisa, Kim, and Tammi meet four young men, Bluey, Josh, Sean, and Marcus. After spending the day at the resort together, the girls are invited to the men's yacht, where they plan to party out at sea. While aboard the boat, they take drugs and the conversation turns to sex, and in particular, types of sexual acts. Bluey describes a sex act called a "donkey punch" which involves punching the female in the back of the head while having doggy style sex in order to increase the sexual pleasure for the man.
Marcus, Bluey, Kim, and Lisa go to the master bedrooms, where they begin having drug-fuelled sex. They are watched by Josh who, in the knowledge of all involved, lingers furtively in the darkness, recording the action with a camera. Bluey, who is copulating with Lisa, asks Josh to film the action and then decides to let Josh take a turn. Josh and Lisa then have anal sex. Immediately prior to ejaculation and with Bluey's encouragement, Josh donkey punches Lisa but uses excessive force, breaking her neck and killing her instantly. To cover up the incident, the men decide to throw the body overboard while the women want to report it to the authorities, and argument ensues about what to do with the tape. Bluey continually insults Tammi and in a fit of rage, she stabs him in the chest with a knife, and the women escape in the yacht's tender. However, the girls soon realise that the tender's outboard motor is missing (a cut scene shows it still attached to the yacht). In a fit of despair, Tammi fires a flare, attracting the attention of the men. They quickly locate and pick up the women. 
Question: Who is the person that throws the donkey punch that kills a woman?
Output (English): Josh.