There are 5 shapes on a 4x4 grid. Which shape is closest to the yellow 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: yellow trapezoid at (1, 3)
Distance from target shape to orange square at (2, 0): 4
Distance from target shape to purple right_triangle at (0, 1): 3
Distance from target shape to red square at (3, 1): 4
Distance from target shape to pink trapezoid at (0, 0): 4
Closest shape is the purple right_triangle at (0, 1) with distance 3</think>

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