Complex sentence: Bernardo Santareno is the pseudonym of António Martinho do Rosário (November 19,1924--August 20,1980), a Portuguese writer considered the greatest portuguese playwright in the 20th century.
Split into simpler sentences: Bernardo Santareno is the pseudonym of António Martinho do Rosário (November 19,1924--August 20,1980), a Portuguese writer. He is considered the greatest portuguese playwright in the 20th century.