Complex sentence: The conflict in the University of Nuevo León gave them a reason to do so-at the end of 1970, teachers and university students had a basic law that proposed a joint government in March 1971 and they went to Héctor Ulises rectory under the new law.
Split into simpler sentences: The conflict in the University of Nuevo León gave them a reason to do so. At the end of 1970, teachers and university students had a basic law that proposed a joint government, in March of 1971, and they went to Héctor Ulises rectory under the new law.