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 ▢

Distractor grid 1:

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

Distractor grid 2:

▢ 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 four X's in a vertical column, starting from the fourth column from the left.
assistant
Expression: The target grid has a unique pattern of alternating rows and columns filled with Xs, while the distractor grids have either all Xs or all empty cells. In particular, the target grid's first row is filled with Xs, followed by two rows of empty cells, then another row of Xs, and so on. This creates a distinctive checkerboard-like appearance that sets it apart from the other grids. The specific arrangement of Xs and em
assistant