Question: To what "Fair Youth of Shakespeare's Sonnets" did Shakespeare dedicate his narrative poem about the legendary Lucretia?
Sentence (from "Henry Wriothesley, 3rd Earl of Southampton"): Shakespeare's two narrative poems, "Venus and Adonis" and "The Rape of Lucrece", were dedicated to Southampton, who is generally identified as the Fair Youth of Shakespeare's Sonnets.
Relevant evidence: Yes