Complex sentence: During the 1920s the party was active in the fight against the General Primo de Rivera and the monarchy, including a failed assassination attempt against the King of Spain Alfonso XIII in an operation that was known as the Complot de Garraf (Conspiracy of Garraf).
Split into simpler sentences: During the 1920s, the party was active in the fight against the General Primo de Rivera and the monarchy. Their actions included a failed assassination attempt against the King of Spain Alfonso XIII in an operation that was known as the Complot de Garraf (Conspiracy of Garraf).