Question: Ty Dolla Sign appeared on the 2014 album Ohio belonging to which American rapper? 
Sentence (from "Ty Dolla Sign"): Tyrone William Griffin Jr. (born April 13, 1985), known professionally as Ty Dolla Sign (stylized as Ty Dolla $ign or Ty$), is an American singer, rapper, songwriter, and record producer.
Relevant evidence: Yes