Catfish is a 2010 American documentary film directed by Henry Joost and Ariel Schulman, involving a young man, Nev, being filmed by his brother and friend, co-directors Ariel and Henry, as he builds a romantic relationship with a young woman on the social networking website Facebook. The film was a critical and commercial success. It led to an MTV reality TV series, "". Using only the above description and what you know about the world, "Catfish filming started in 2009." is definitely correct, incorrect, or inconclusive? 