Complex sentence: 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: 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.