question:  What is Prantera referring to when he mentions a 'mouthpiece'?
context: A gun is an interesting weapon; it can be hired, of course, and naturally doesn't care who hires it. Something much the same can be said of the gunman, too.... The evening was dark, it was unlikely that the other even saw the circle of steel that was the mouth of the shotgun barrel, now resting on the car's window ledge. And at that moment, the universe caved inward upon Joseph Marie Prantera. A door slid open in the wall in a way that Joe had never seen a door operate before. The other spoke precisely and slowly, the way a highly educated man speaks a language which he reads and writes fluently but has little occasion to practice vocally. If I am not mistaken, you are Joseph Salviati-Prantera." It opened on his approach, the door sliding back into the wall in much the same manner as the room's door had opened for Reston-Farrell. Reston-Farrell said, "I am afraid, Mr. Salviati-Prantera, that these are the only garments available. Reston-Farrell had approached the door by which he had entered and it reopened for him. He wondered, all over again, if this was some kind of pressure cooker. Warren, this is our guest from ... from yesteryear, Mr. Joseph Salviati-Prantera." He said gently, "I think it would be Mr. Joseph Prantera, wouldn't it? Whatever the something else was, a slot opened in the middle of the table and a glass, so clear of texture as to be all but invisible, was elevated. Joe Prantera's mind suddenly reverted to those last memories and his eyes narrowed dangerously. Reston-Farrell said, "Mr. Prantera, we have brought you from your era to perform a task for us." For the second time, Reston-Farrell said, "Where would you go, Mr. Prantera?" The two men of the future said nothing more for long minutes while Joe Prantera's mind whirled its confusion. "That is why we brought you here, Mr. Prantera.
output:  a lawyer
options:  a lawyer  a weapon  a disguise  a crime boss