sentences:  In 1925, he moved to Cartagena, where, at the age of 18, he directed and illustrated some sections for the newspaper "La Patria" under the pseudonym of "Sanmardel".Soon after, in 1926, Martínez traveled to Chicago, where he studied and worked for over five years at the Fine Arts Institute of Chicago under the tutoring of Ruth VanSickle Ford.In Chicago, Martínez befriended and worked alongside Edward Hopper, Isamu Noguchi, Willem de Kooning and Edgar Kaufmann Jr., among others.