Question: On what date was Rihanna's album containing the song "Half of Me" released?
Sentence (from "Unapologetic"): "Unapologetic" is mainly a pop, dubstep and R&B album that incorporates elements of hip hop, EDM and reggae in its production, similar to the sound of her previous albums "Talk That Talk" and "Rated R" (2009).
Relevant evidence: No