Complex sentence: The film is loosely based on the 1939 novel "The Grapes of Wrath" by John Steinbeck, combined with true events, in which a teen involved with illegal street racing caused four deaths in Arizona, filmed in Tucson.
Split into simpler sentences: The film is loosely based on the 1939 novel "The Grapes of Wrath" by John Steinbeck. Combined with true events, in which a teen involved with illegal street racing caused four deaths in Arizona, filmed in Tucson.