Complex sentence: By June 1972, when Wilson was featured on the cover of "Time" magazine, there were over 1,400 Holiday Inns worldwide, and the motto changed to "The World's Innkeeper".
Split into simpler sentences: By June 1972, when Wilson was featured on the cover of "Time" magazine, there were over 1,400 Holiday Inn hotels worldwide. The motto then changed to "The World's Innkeeper".