There are 4 shapes on a 9x9 grid. Which shape is closest to the green 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: green rectangle at (4, 7)
Distance from target shape to purple rectangle at (8, 3): 8
Distance from target shape to brown trapezoid at (5, 3): 5
Distance from target shape to pink square at (5, 2): 6
Closest shape is the brown trapezoid at (5, 3) with distance 5</think>

<answer>(5, 3)</answer>