Complex sentence: He was a fervent anti-monarchist first and then an anti-fascist, he wrote for magazines of political satire under the name of "Fideno", while his father signed himself "Olrac".
Split into simpler sentences: He was a fervent anti-monarchist first and then an anti-fascist. He wrote for magazines of political satire under the name of "Fideno", while his father signed himself "Olrac".