Four score and seven years ago, our forefathers brought forth upon this continent a new nation conceived in (liberty) and dedicated to the proposition all men are created equal.

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what part of speech is new nation, concieved in liberty and dedicated to the proposition that all men are created equal/

The quote you provided is the opening line of the Gettysburg Address, a famous speech delivered by President Abraham Lincoln during the American Civil War. The correct line is "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."

In this quote, "four score and seven years ago" refers to 87 years prior to the time of the speech, which would be 1776. This is a reference to the year when the United States Declaration of Independence was signed, establishing America as an independent nation.

The phrase "our fathers brought forth on this continent a new nation" refers to the founding of the United States by the colonists who settled in North America.

The phrase "conceived in Liberty" highlights the idea that the United States was born out of the desire for freedom and independence.

Lastly, "dedicated to the proposition that all men are created equal" expresses the belief that all individuals, regardless of their race, background, or social status, should be treated with equal rights and opportunities.

Overall, Lincoln's Gettysburg Address aimed to honor the soldiers who fought and died in the Civil War and to remind the nation of the importance of preserving the principles of liberty and equality upon which the United States was founded.