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 ▢ 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 grid that has two rows of three consecutive filled cells each, and all other cells are empty.
assistant
Expression: The target grid features a central diagonal of filled cells, with empty cells surrounding it, creating a distinct pattern of alternating filled and empty cells. This pattern is unique among the three grids, as the distractors have different arrangements of filled and empty cells.
assistant