Select the correct text in the passage. Which sentence in the Gettysburg Address supports the claim that President Lincoln did not recognize the historical importance of his speech?

[Four score and seven years ago our fathers brought forth, upon this continent. a new nation, conceived in liberty, and dedicated to the
proposition that "all men are created equal."]
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived, and so dedicated, can long endure. We are met
on a great battie field of that war. We have come to dedicate a portion of it. as a final resting place for those who died here, that the nation
might live. This we may. in all propriety do. [But in a larger sense, we can not dedicate-we can not consecrate-we can not hallow. this ground]
-The brave men, Iiving and dead, who struggled here, have hallowed it. far above our poor power to add or detract. [The world will little note,
nor long remember what we say here: while it can never forget what they did here.]
[It is rather for us, the Iiving. we here be dedicated to the great task remaining before us-that. from these honored dead we take increased
devotion to that cause for which they here. gave the last full measure of devotion]—that we here highly resolve these dead shall not have died in
vain: that the nation, shal have a new birth of freedom, and that government of the people by the people for the people, shall not perish from
the earth.

I have to select one sentence that has brackets