Possible Clues:

• Penn movie with a Seussian title
• First sentence of a book written with only 50 distinct words
• 2001 drama whose title is taken from 'Green Eggs and Ham'
• 2001 movie with Sean Penn and Dakota Fanning
• 2002 Penn/Pfeiffer vehicle
• 2001 Penn-Fanning film
• Sean Penn movie
• Film, the essence of J Williams: Amistad
• Sean Penn drama
• Film that garnered Sean Penn his third Oscar nomination