Complex sentence: Beginning in the mid- 1980s the firm began winning commissions for a number of institutional projects, completing in 1984 the Observatory Hill Dining Hall at the University of Virginia, in Charlottesville, Virginia.
Split into simpler sentences: Beginning in the mid- 1980s the firm won commissions for a number of institutional projects. In 1984 the firm completed the Observatory Hill Dining Hall at the University of Virginia, in Charlottesville, Virginia.