Question: Anthony Mandler is an American film director, music video director, television commercial director and photographer, a frequent collaborator of Rihanna, the two have worked on sixteen music videos together throughout her career, beginning with "Unfaithful", a 2006 song by Barbadian singer Rihanna from her second studio album "A Girl like Me", released in what year?
Sentence (from "Unfaithful (song)"): Originally titled "Murderer", the single speaks about a woman who regrets cheating on her partner.
Relevant evidence: No