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 battlefield of that war. Which quotation correctly uses ellipsis to shorten Lincoln’s words?

Now we are engaged in a great civil war, testing whether that nation . . . can long endure. We are met on a great battlefield of that war.
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 battlefield of that war.
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated . . . We are met on a great battlefield of that war.
Now . . . 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 battlefield of that war.