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

<answer>(1, 2)</answer>