Complex sentence: In November 2011, it was revealed that Tegan and Sara were writing new material for their seventh studio album, with Tegan saying that (we) are back in our home studios working away at more songs.
Split into simpler sentences: In November 2011, it was revealed that Tegan and Sara were writing new material for their seventh studio album. Tegan said that (we) are back in our home studios working away at more songs.