Is the river a c/f vs. an unknown?

Poker Stars, $0.05/$0.10 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

BTN: $15.06 (150.6 bb)
SB: $10 (100 bb)
Hero (BB): $11.77 (117.7 bb)
UTG: $6.78 (67.8 bb)
MP: $12.36 (123.6 bb)
CO: $10.15 (101.5 bb)

Preflop: Hero is BB with Q Q
UTG folds, MP raises to $0.20, 3 folds, Hero raises to $0.80, MP calls $0.60

Flop: ($1.65) J 7 6 (2 players)
Hero bets $1.20, MP calls $1.20

Turn: ($4.05) 6 (2 players)
Hero bets $2.50, MP calls $2.50

River: ($9.05) A (2 players)