A good starting point would be describing the Phoenicians. Saying who they were, when they rose and when they fell, etc. Then end the paragraph with "This is how this magnificent culture influenced Rome" then start your essay on how they influenced it with "The first way the Phoenicians influenced Rome is..."
Elizabeth Cady Stanton and Lucretia Mott wrote the Declaration of Sentiments for the Seneca Falls Women's Rights Convention (1848) in upstate New York, deliberately modeling it on the 1776 Declaration of Independence.