Complex sentence: General contractor Elkins Constructors began work on the trust's new home on July 17,2007; noted architect Graham Gund contributed to the design as a green building according to LEED standards for environmentally sustainable construction developed by the United States Green Building Council.
Split into simpler sentences: General contractor Elkins Constructors began work on the trust's new home on July 17,2007; noted architect Graham Gund contributed to the design. The building was designed using LEED principles, a set of standards for environmentally sustainable construction developed by the United States Green Building Council.