Complex sentence: Adjusted for inflation, it is the most successful film in box-office history, and has placed in the top ten of the American Film Institute's list of top 100 American films since the list's inception in 1998.
Split into simpler sentences: Adjusted for inflation, it is still the most successful film in box-office history. It has placed in the top ten of the American Film Institute's list of top 100 American films since the list's inception in 1998.