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 has a diagonal line of filled cells starting from the top-left corner and extending to the bottom-right corner, with additional filled cells above the diagonal line.
assistant
Expression: The grid with an X in the first row, five Xs in the first column, and increasing numbers of empty cells as you move away from the first column and first row.

The target grid has an "X" in the first row, and five "X"s in the first column, with the number of empty cells increasing as you move away from the first column and first row. Distractor grid 1 has an "X" in the first row but does
assistant