Which words from the first line of The Gettysburg Address best reflect Lincoln's formal diction?

The Gettysburg Address was the speech made by the then President Abraham Lincoln as a remarks during the official dedication ceremony for the National Cemetery of Gettysburg. This was held in Pennsylvania which was the setting of one of the bloodiest wars and battles in the history of civil war. The words from these address that denotes how formal Lincoln’s diction were his greetings such as," fourscore and seven year ago ...".