Which episode?

Sorry for such an specific question, but I quitted watching One Piece anime 2 years ago, and I don't know in which episode I left it. I know it was in Water 7 saga, in the chapter where Robin gets captured in the city and Luffy jumps into some kind of train to Enies Lobby, but I can't find the episode by the description on the wiki. I know it was between episode 220-300 thx btw