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 ▢ ▢ ▢ ▢

Distractor grid 1:

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

Distractor grid 2:

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 row completely filled with Xs and the bottom row completely filled with empty cells.
assistant
Expression: The target grid has more X-shaped cells than either of the distractor grids, particularly in the upper left and lower right corners where there are four consecutive X-shaped cells. Additionally, it contains fewer empty cells compared to the distractor grids, especially in the middle row where all five cells are filled with X. The target grid's unique pattern can be identified by these characteristics.
assistant