You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
University_of_Chicago

Context:
Students at the University of Chicago run over 400 clubs and organizations known as Recognized Student Organizations (RSOs). These include cultural and religious groups, academic clubs and teams, and common-interest organizations. Notable extracurricular groups include the University of Chicago College Bowl Team, which has won 118 tournaments and 15 national championships, leading both categories internationally. The university's competitive Model United Nations team was the top ranked team in North America in 2013-14 and 2014-2015. Among notable RSOs are the nation's longest continuously running student film society Doc Films, organizing committee for the University of Chicago Scavenger Hunt, the twice-weekly student newspaper The Chicago Maroon, the alternative weekly student newspaper South Side Weekly, the nation's second oldest continuously running student improvisational theater troupe Off-Off Campus, and the university-owned radio station WHPK.

Question:
What is the name of the country's longest continuously running student film society?

Doc Films