There are 6 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 trapezoid at (4, 2): 2
Distance from target shape to cyan square at (0, 2): 4
Distance from target shape to blue rectangle at (3, 0): 1
Distance from target shape to red right_triangle at (4, 1): 1
Distance from target shape to green right_triangle at (2, 3): 3
Closest shape is the blue rectangle at (3, 0) with distance 1</think>

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