Find the movie name from the given conversation. If the movie name is not found give output as "unknown"
Q: ASSISTANT: What kind of movies to you like, and why do you like this type of movie? , USER: Sometimes I really like sand and sword period pieces. , USER: I like them because you know, they usually have some sort of like historical content to them, and they're usually action-oriented, too. , ASSISTANT: Can you name a particular movie that you like? , USER: Probably the best one that comes in mind is Ben-Hur.
A: 
Ben-Hur