Question: Which band, Marianas Trench or Car Seat Headrest, signed to Matador Records in 2015?
Sentence (from "Marianas Trench (band)"): The band has released four full-length studio albums, the most recent titled "Astoria", released on October 23, 2015, along with 2011's "Ever After", 2009's "Masterpiece Theatre" and 2006's "Fix Me".
Relevant evidence: No