in other words meaning your poem should be meaningful and have a message or drfinition behind it ..mean something symbolic
They revolutionized newspapers by changing how they worked. Because they wanted to beat each other in their businesses, they started creating what was called yellow journalism which was focused on sensationalism and high print numbers so that anyone could buy them. They introduced the system of advertisements in to pay the costs of production.<span />
I believe the linking verb is “will”. It’s linking the subject “the United States of America” and the predicate “be 300 years old!”