Conversation so far:
What was the 125 cc World Championship?
The World Championship is the premier championship of motorcycle road racing, which is divided into three classes: Moto3, Moto2 and MotoGP.
Did Marc Márquez win the 125cc World Championship?
Marc Márquez became the second-youngest World Champion after Loris Capirossi.
What year did Marc Márquez win the 125cc World Championship?
Marc Márquez won the championship in 2010.

Question: Who did he work with?
Self-contained rewrite: Who did Marc Márquez work with?