Complex sentence: The new building was scheduled to be completed by the end of 2010, but budget shortfalls pushed that date until the end of 2012, resulting in the class of 2013 being the first class to graduate from the new building.
Split into simpler sentences: The new building was scheduled to be completed by the end of 2010, but budget shortfalls pushed that date until the end of 2012. Resulting in the class of 2013 being the first class to graduate from the new building.