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".
You are also given a referring expression that describes one of the given grids.
Your task is to select the grid that matches the given referring expression.
Generate only the number (in text) of the grid that matches the given expression by selecting first, second, or third.

First:

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

Second:

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

Third:

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

Expression: The target grid has an unbroken line of five Xs in the middle row, with Xs in the first and last rows and columns, and the remaining cells empty.
Question: Which grid does the expression refer to?
Start with the tag "Answer: ", followed by your selection. Omit any other text.

Answer: First

The expression describes the first grid because it has an unbroken line of five Xs in the third row, with Xs in the first and last rows and columns, and the remaining cells empty.
assistant
Answer: First

The expression describes the first grid because it has an unbroken line of five Xs in the third row, with Xs in the first and last rows and columns, and the remaining cells empty.
assistant