Rosario Sansores

María del Rosario Sansores Prén (Mérida, Yucatán; August 25, 1889 - Mexico City; January 7, 1972) was a Mexican poet, known for works such as Cuando Tú Te Hayas Ido (When you have gone), a poem that served as the basis for the Pasillo "Sombras", set to music by the Ecuadorian composer Carlos Brito Benavides.