There are 5 shapes on a 4x4 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 (1, 0)
Distance from target shape to green trapezoid at (3, 0): 2
Distance from target shape to gray rectangle at (1, 3): 3
Distance from target shape to purple right_triangle at (0, 1): 2
Distance from target shape to pink trapezoid at (0, 3): 4
Closest shape is the green trapezoid at (3, 0) with distance 2</think>

<answer>(3, 0)</answer>