There are 4 shapes on a 3x3 grid. Which shape is closest to the purple trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: purple trapezoid at (1, 0)
Distance from target shape to blue trapezoid at (2, 2): 3
Distance from target shape to pink trapezoid at (2, 0): 1
Distance from target shape to green right_triangle at (1, 2): 2
Closest shape is the pink trapezoid at (2, 0) with distance 1</think>

<answer>(2, 0)</answer>