

Human: What are some of Sean Penn's best film roles?

Assistant: 
I’ll try to answer this question! This is really hard, since there are so many great films and movies, and I’m really not a huge Sean Penn fan, so I won’t be very familiar with his films. But what I’ll try to do is think through this on my own, and then we can compare notes about the ones I suggest. And if I forget a really great one, you can just let me know!
His performance in the 2007 film Into the Wild is really powerful.  This is one of my personal favorite movies.