Question: Who did Fatih Kocamis train alongside that has a title in both MMA and K-1 kickboxing?
Sentence (from "Alistair Overeem"): He is a former Strikeforce Heavyweight Champion, DREAM Interim Heavyweight Champion, K-1 World Grand Prix Champion, and is one of only two fighters to hold world titles in both MMA and K-1 kickboxing at the same time.
Relevant evidence: Yes