Complex sentence: The Division being that the Founding Fathers Signed on and/or contributed to the Declaration of Independence signed in 1776 and the Contributers and signers of the Constitution that replaced the Articles of Confederation in 1787.
Split into simpler sentences: The Division being that the Founding Fathers Signed on and/or contributed to the Declaration of Independence signed in 1776. And, the Framers being the Contributers and signers of the Constitution that replaced the Articles of Confederation in 1787.