You are given three grids, where each of them is 5 by 5 in size.
Grids have empty cells marked with "▢" and filled cells marked with "X".
Your task is to generate a referring expression that best describes the target grid while distinguishing it from the two other distractor grids.
The first grid is the target grid, and the following two grids are the distractors.

Target grid:

X X X X X
X ▢ X ▢ X
X ▢ X ▢ X
X ▢ X ▢ X
X X X X X

Distractor grid 1:

X X X X X
X ▢ ▢ ▢ X
X ▢ ▢ ▢ X
X ▢ ▢ ▢ X
X X X X X

Distractor grid 2:

X X X X X
X X X X X
▢ ▢ X ▢ ▢
X X X X X
X X X X X

Instruction: Describe the target grid.
Generate the referring expression starting with the tag "Expression: " for the given target grid. Omit any other text.
Expression: The target grid is a 5 by 5 grid with filled cells forming a border around the grid and a cross in the middle, where the cross is made up of filled cells in the 2nd, 3rd and 4th columns of the 2nd, 3rd and 4th rows.
assistant
Expression: The grid has a pattern of "X" in the top row, bottom row, and both diagonals, with "X" in the center column but only in odd rows, and "▢" in all other positions.<|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|><|im_end|>
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