Complex sentence: His poetry was published in various magazines from the early 1920s; his first collection, "Motivos de son" (1930) was strongly influenced by his meeting with the American poet, Langston Hughes, earlier that year.
Split into simpler sentences: His poetry was published in various magazines from the early 1920s. His first collection, "Motivos de son", appeared in 1930 and was strongly influenced by his meeting with the American poet, Langston Hughes, earlier that year.