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

Action Reasoning:
To move towards the goal state, we need to clear car_2 from behind car_3. I will move car_2 from behind car_3 to curb_1, which is clear.

New State Description:
Curb_0 has car_0 parked, clear. Curb_1 now has car_2 parked, clear. Curb_2 has car_3 parked, clear. Curb_3 has car_1 parked, clear.

Action Chosen:
(move-car-to-curb car_2 car_3 curb_1)
