Summarize the opening of the Gettysburg Address in simple modern English. 

"Four score and seven years ago our fathers brought forth on 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 battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this."

87 years ago, we created this country so that people could be equal. We will see if a country like this can survive civil war. It's right that we remember people who died fighting for this country and are buried here.