There are 5 shapes on a 3x3 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, 1)
Distance from target shape to blue rectangle at (2, 2): 2
Distance from target shape to cyan right_triangle at (0, 2): 2
Distance from target shape to gray square at (2, 0): 2
Distance from target shape to orange right_triangle at (2, 1): 1
Closest shape is the orange right_triangle at (2, 1) with distance 1</think>

<answer>(2, 1)</answer>