Complex sentence: In March 2007, a multi-year study of leadership at eight Smithsonian museums concluded that the National Portrait Gallery needed stronger, more visionary leadership intent on creating a truly national museum.
Split into simpler sentences: In March 2007, a multi-year study of leadership at eight Smithsonian museums made recommendations about the National Portrait Gallery. The report concluded that the museum needed stronger, more visionary leadership intent on creating a truly national museum.