Question: who made their debut single "hey Mami" and  had records released by a co-founder of Trekky Records?
Sentence (from "Sylvan Esso"): They made their debut with the single "Hey Mami" and released their eponymous debut album on Partisan Records on  12, 2014 (2014--) , which reached No. 39 on the "Billboard" 200.
Relevant evidence: Yes