There are 3 shapes on a 5x5 grid. Which shape is closest to the yellow rectangle 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 rectangle at (3, 1)
Distance from target shape to brown rectangle at (3, 3): 2
Distance from target shape to green trapezoid at (3, 2): 1
Closest shape is the green trapezoid at (3, 2) with distance 1</think>

<answer>(3, 2)</answer>