Complex sentence: In early 2007, LeBoeuf, Lamb, Greene & MacRae had approximately 650 attorneys in 19 offices around the world and was best known for its work in energy and insurance.
Split into simpler sentences: In early 2007, LeBoeuf, Lamb, Greene & MacRae had approximately 650 attorneys in 19 offices around the world. Previously, the office was best known for its work in energy and insurance.