Complex sentence: He arrived at the port of Buenos Aires in 1601 and was married on July 8,1605 to Blanca de Vasconcelos, daughter of Mendo de Vasconcelos and Juana de Atouguia.
Split into simpler sentences: He arrived at the port of Buenos Aires in 1601. Blanca was the daughter of Mendo de Vasconcelos and Juana de Atouguia.