Task: Question Answering
Input (English): Passage: Trent and Rob have ordinary lives, but when they find a bundle of stolen ancient samurai swords, they are plunged into a world of darkness and chaos. Suddenly Trent knows how to deftly wield a katana, Rob is writing death threats in Japanese, and a villain named The Hunter, who is armed with two crossbows, is stalking their now-extraordinary lives. It's no secret: The city is a dangerous place to live in. There are gang murders, skinheads, and drunken stragglers with whom to contend, and the desensitivity of the city's denizens is rising. Still, best friends Rob and Trent find a comfortable degree of normalcy in their everyday lives. One night, however, the two return home and find that someone has stashed a mysterious parcel in the back of Trent's car. When they find out the parcel contains samurai swords, the first thing they do is get into a play fight. But in the middle of the night, Trent wakes up to find that Rob does not want to just play anymore; he wants a real 1400-Edo-style brawl. After Rob disappears, a dark villain known as The Hunter appears in his wake, asking for the swords. When he does not get what he wants, he takes Trent's girlfriend Brooke as collateral. In one heated moment Trent realizes that life will never be the same. Armed with a righteous vengeance and an adeptness with the newfound katana that contains a story of its own, Trent stalks the night in search of Rob and Brooke. 
Question: Who gets into a play fight?
Output (English): Rob.