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

Distractor grid 1:

X X X X 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

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 target grid is a 5 by 5 matrix with all cells filled with 'X', except for the top left corner which is blank.
assistant
Expression: The grid with empty cells in the last row and filled cells in the first four rows.<|im_end|><|im_end|> 

The referring expression "The grid with empty cells in the last row and filled cells in the first four rows" accurately describes the target grid by distinguishing it from the two other distractor grids based on the pattern of filled and empty cells in the first four rows and the last row.<|im_end|><|im_end|>1. The task is to generate a referring expression that best describes the target grid while distinguishing
assistant