Question: Which is a real documentary, The River or Gente di Roma?
Context: The River is a 1938 short documentary film which shows the importance of the Mississippi River to the United States, and how farming and timber practices had caused topsoil to be swept down the river and into the Gulf of Mexico, leading to catastrophic floods and impoverishing farmers.  It ends by briefly describing how the Tennessee Valley Authority project was beginning to reverse these problems. Gente di Roma is a 2003 Italian comedy mockumentary film directed by Ettore Scola.  It is close to Federico Fellini's "Roma". Campagnano di Roma is a "comune" (municipality) in the Metropolitan City of Rome in the Italian region Latium, located about 30 km northwest of Rome.  It was first mentioned in 1076, having been carved out of the great estate assembled on the Roman pattern by Pope Adrian I, ca. 780, his "Domusculta Capracorum".  In medieval times, Campagnano di Roma was on the "via Francigena".  Here, Sigeric, Archbishop of Canterbury, sojourned on his return journey from Rome about 990. Banco di Roma was an Italian bank based in Rome, Lazio region.  Along with Credito Italiano and Banca Commerciale Italiana they were considered as bank of national interests.  In 1991 the bank was merged with Banco di Santo Spirito and Cassa di Risparmio di Roma to form Banca di Roma, a predecessor of Capitalia (which was acquired by UniCredit in 2007). The Museo di Roma in Trastevere was established in 1977 in the restored Carmelite convent of Sant'Egidio.  It was initially known as the Museo del Folklore e dei Poeti Romaneschi ("museum of folklore and Roman dialect poets").  Following a period of closure it was reopened under its present name in 2000.  In addition to a permanent collection related to the recent culture of Rome the museum also houses temporary exhibitions, including the annual World Press Photo exhibition.  It is part of the Museo di Roma. The Museo di Roma is a museum in Rome, Italy, part of the network of Roman civic museums.  The museum was founded in the Fascist era with the aim of documenting the local history and traditions of the "old Rome" that was rapidly disappearing, but following many donations and acquisitions of works of art is now principally an art museum.  The collections initially included 120 water-colours by the nineteenth-century painter Ettore Roesler Franz of "Roma sparita", "vanished Rome", later moved to the Museo di Roma in Trastevere. Cervara di Roma is a "comune" (municipality) in the Metropolitan City of Rome in the Italian region Latium, located about 50 km east of Rome.  Cervara di Roma borders the following municipalities: Agosta, Arsoli, Camerata Nuova, Marano Equo, Rocca di Botte, Subiaco. The Rome Grand Prix (Italian: "Gran Premio di Roma" ), also known as the "Premio Reale di Roma" (1925–1932) and "Gran Premio di Roma" (1947–1991), was an automobile race held in Rome, Italy from 1925 until 1991. The Sapienza University of Rome, (Italian: Sapienza – Università di Roma), also called simply Sapienza or the "University of Rome", is a collegiate research university located in Rome, Italy.  Formally known as Università degli Studi di Roma "La Sapienza", it is the largest European university by enrollments (the third if considering also the distance learning schools) and one of the oldest in history, founded in 1303. Fondazione Roma formerly Fondazione Cassa di Risparmio di Roma is a charity organization based in Rome, Italy.  The organization was re-founded as a banking foundation in 1991, by spin-off its banking activities (Cassa di Risparmio di Roma) to merge with other Roman banks to form Banca di Roma S.p.A. (the predecessor of Capitalia).  The foundation remained as a shareholder of UniCredit, the banking group that acquired Capitalia in mid-2007.  As at 31 December 2006, the foundation was the second largest shareholder of Capitalia for 5.02% stake.
Answer: The River