This spot takes place fairly deep in the tournament. There are about 300 Peoples remaining, 126 get paid over 850 runners. I was just moved to this table about an orbit ago so I have no reads.

Blinds 600/1200 with 200 Ante.

Hero 55,000: Opens AKo UTG to 2,400
CO 50,000: 3 bets to 5,800
Button 35,000: 4 bets AI to 35,000
Hero??

This is a spot that in the moment I thought was pretty standard and did not give it much thought. Just wondering how you play this spot?