Complex sentence: As of 2014, there were 2,250 Public Storage locations in North America, 193 locations operated by Shurgard Europe, which Public Storage owns 49 percent of, and 2,546 office parks operated by PS Business Parks, which Public Storage owns a 42 percent interest in.
Split into simpler sentences: As of 2014, there were 2,250 Public Storage locations in North America and 193 locations in Europe (operated by Shurgard Europe, which Public Storage owns 49 percent of). There are also 2,546 office parks operated by PS Business Parks, which Public Storage owns a 42 percent interest in.