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

Distractor grid 1:

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

Distractor grid 2:

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: In the target grid, the two middle rows have three filled cells each, and the rightmost column has two filled cells.
assistant
Expression: Target grid:
□ X X ▢ ▢
□ ▢ ▢ X ▢
□ ▢ ▢ ▢ ▢
□ X X ▢ ▢ 

This referring expression describes the target grid as a square grid with five rows and five columns, each cell containing either a "□" or an "X". The "□" represents an empty cell, while the "X" represents a filled cell. The grid has a specific pattern of alternating between black
assistant