In the 19th century, the Cuban poet José Martí wrote the famous poem, "Yo soy un hombre sincero" ("I'm a sincere man"). This poem became the lyrics of the popular song "Guantanamera". Rubén Darío was a famous modernist poet. He wrote "Azul" (1888). Cesar Vallejo is one of the most important poets in the Spanish Language. Vallejo wrote "Trilce ("1922). 