$50 NLHE MTT Deep Stacked: $20 MTT. 3way flop, River spot

~50bb eff, HJ good reg open 2.5x, CO flats, Hero BB called :ks: :6s:

Flop:

:qs: :9s4: :5s4:Checked around.

Turn :10c4: (8BB) Hero bets 4.5bb. CO called.