Complex sentence: When he left the priesthood (1969) he wrote Sermones en España, wich became banned by the Franco dictatorship, finally this literary work came to light in 1971, after a year and a half of ban.
Split into simpler sentences: When he left the priesthood (1969) he wrote Sermones en España, which was banned by the Franco dictatorship. Finally this literary work came to light in 1971, after a year and a half of ban.