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

Distractor grid 1:

X X ▢ X X
X 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 grid with the top and middle rows filled with 'X' except for the third column which is empty, and the bottom row mirroring the top and middle rows. The third row is completely empty.
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Expression: Target grid

The target grid is a 5x5 grid filled with empty cells marked with "▢" and filled cells marked with "X". The grid has four rows and five columns, with each row containing four cells and each column containing five cells. The top-left cell is marked with "X", the top-right cell is marked with "X", and so on, until the bottom-right cell is marked with "X". The grid also contains four rows of "X" cells
assistant