There are 5 shapes on a 5x5 grid. Which shape is closest to the yellow right_triangle 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 right_triangle at (2, 4)
Distance from target shape to pink trapezoid at (1, 0): 5
Distance from target shape to cyan trapezoid at (4, 1): 5
Distance from target shape to gray trapezoid at (1, 3): 2
Distance from target shape to blue square at (2, 2): 2
Closest shape is the gray trapezoid at (1, 3) with distance 2</think>

<answer>(1, 3)</answer>