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 filled cells along the top row and empty cells in the rest of the grid.
assistant
Expression: The top row filled with X's and the rest are empty.

The target grid has a distinctive pattern where the first row is filled with X's, while all other rows are empty. This distinguishes it from the first distractor grid, which has its first row empty and the second row filled with X's, and the second distractor grid, which has its third row filled with X's and the first two rows empty.
assistant