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

<answer>(1, 0)</answer>