Q:Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Who are Allison Kerry's FBI Contacts? Movie plot title: Saw IV Movie plot: This article's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. (October 2015) (Learn how and when to remove this template message) A wax-coated microcassette is found in John Kramer's stomach during his autopsy. It reveals to Mark Hoffman, the detective called in to hear it, that the games, including his own, will continue. Elsewhere, two men - one with his eyes sewn shut, the other with his mouth sewn shut - awaken in a mausoleum, chained at the neck to a winch. The blinded man panics and activates the winch while attacking the muted man, who kills him and removes a key from his collar to free himself. Four days after Allison Kerry's death, a SWAT team led by Hoffman and Lieutenant Rigg finds her body, and Hoffman warns Rigg for breaking through an unsecured door to reach her. The scene is also investigated by Peter Strahm and Lindsey Perez, Kerry's FBI contacts, who received a message and a key from her. Noting Kramer's and Amanda Young's physical limitations, Strahm states they are looking for an unidentified accomplice; he soon becomes suspicious of Rigg, who has developed an obsession with saving people in the six months since the disappearance of Eric Matthews. That night, Rigg is attacked in his home; he awakens to learn that Matthews is alive and has ninety minutes to save himself, with Hoffman's life also at risk. Meanwhile, he must play his own game to face and overcome his obsession. The detectives are shown to be at each end of a large seesaw: Matthews is held atop an ice block by a chain-noose, and Hoffman is strapped to a chair with electrodes at his feet. If Matthews slips or too much ice melts, both men will die. A man later arrives to oversee the game. Rigg finds a pimp, Brenda, bound to a chair in his living room. He is implored to leave her, but he accidentally starts the trap by removing her gag, which slowly tears her scalp. He frees her, but kills her in self-defense when she attacks with a knife,...
A:
Peter Strahm and Lindsey Perez