Complex sentence: The last tenants, consisting of small restaurants and shops, were moved out in 2002 in preparation for the remodeling to begin in March or April 2003, but on February 18,2003, following a historic blizzard, the roof collapsed.
Split into simpler sentences: The last tenants, consisting of small restaurants and shops, were moved out in 2002 in preparation for the remodeling to begin in March or April 2003. But on February 18,2003, following a historic blizzard, the roof collapsed.