Complex sentence: The Sunburst community, which began as a communal group in the late 1960s, founded and led by Norman Paulsen, was in its prime one of the largest shippers of organic products in the United States.
Split into simpler sentences: The Sunburst community began as a communal group in the late 1960s, founded and led by Norman Paulsen. In its prime, it was one of the largest shippers of organic products in the United States.