Task: Question Answering
Input (English): Passage: Trans-America Air Lines pilot "Three Star" Bob Halsey is in love with stewardess Judy Wagner, but she wants him to stop his daredevil ways. So does his boss, Lackey. Confident in his abilities and knowing that he is the airline's best pilot, he pays neither any mind.
Federal agent Brownell urgently requests Lackey's cooperation: Clement Williams must be flown from Los Angeles to Washington, D.C., with a cylinder full of a revolutionary new explosive he has invented. However, Lackey's assistant Jason is eavesdropping on him for Taggart, a spy.
He eavesdrops again when Lackey chooses Bob as pilot and Judy's brother Tom as co-pilot. Taggart sends three men to provoke Bob into a fistfight. While Bob is knocked out, another pilot, George Wexley, chats casually with Tom, "learns" that Bob is late for the special trip, and offers to protect Bob's job by taking over.
Over the lower Sierras, the Ford Trimotor airliner explodes.
Bob and Lackey fly to the crash site and talk to Brownell. Tom's cap is there. Back in Los Angeles, they report that there are no survivors.
Frantic for news of her brother, Judy drives to the site before they return, evading the police roadblock. She is recognized by Jason, who is traveling with the spies to a nearby house they are using. Improvising a plan, they pose as federal agents and stop her. 
Question: What are the full names of the people on the flight when it exploded?
Output (English): Clement Williams.