Complex sentence: North Dakota was far away from the centers of the hippie movement on the coasts of the United States, but this did not mean that the local students did not know what was going on with their peers at schools such as University of California, Berkeley.
Split into simpler sentences: North Dakota was far away from the centers of the hippie movement on the coasts of the United States. This did not mean that the local students did not know what was going on with their peers at schools such as University of California, Berkeley.