Attempt Number: 4
Error Message: Action not unique compared to other actions chosen from this state before. Choose a new action

Action Reasoning:
To progress toward the goal, move car_2 to the empty curb_2, making curb_3 clear for car_3.

New State Description:
Curb_0 contains car_0, clear. Curb_1 contains car_1, clear. Curb_2 contains car_2, clear. Curb_3 contains car_3, clear. Car_0 is parked and clear. Car_1 is parked and clear. Car_2 is parked at curb_2 and clear. Car_3 is parked at curb_3 and clear.

Action Chosen:
(move-car-to-curb car_2 car_3 curb_2)
