plo50 - is this a fold? or a backshove?

plo50 - clubgg - 35vpip

Hero (UTG): 100 BB
UTG+1: 103.24 BB (VPIP: 48.86, PFR: 18.18, 3Bet Preflop: 14.63, Hands: 110)
MP: 43.24 BB (VPIP: 40.00, PFR: 17.50, 3Bet Preflop: 18.18, Hands: 51)
CO: 241.02 BB (VPIP: 17.65, PFR: 11.76, 3Bet Preflop: 0.00, Hands: 21)
BTN: 172.62 BB (VPIP: 0.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 6)
SB: 100 BB (VPIP: 48.57, PFR: 14.29, 3Bet Preflop: 3.61, Hands: 271)
BB: 140.34 BB (VPIP: 80.00, PFR: 20.00, 3Bet Preflop: 0.00, Hands: 7)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has K♠ K♦ 9♦ 2♣

Hero calls 1 BB, UTG+1 calls 1 BB, MP calls 1 BB, CO calls 1 BB, BTN calls 1 BB, SB calls 0.5 BB, BB raises to 8 BB, Hero calls 7 BB, UTG+1 raises to 36 BB, fold, fold, fold, fold, BB calls 28 BB,

Hero???