Question: What was the population in 2011 of the district in which the civil parish of Mellor is located ?
Context: Ribble Valley is a local government district with borough status within the non-metropolitan county of Lancashire, England.  The total population of the non-metropolitan district at the 2011 Census was 57,132.  Its council is based in Clitheroe.  Other places include Whalley, Longridge and Ribchester.  The area is so called due to the River Ribble which flows in its final stages towards its estuary near Preston.  The area is popular with tourists who enjoy the area's natural unspoilt beauty, much of which lies within the Forest of Bowland. Welburn is a village and civil parish in the Ryedale district of North Yorkshire, in England, 2 miles south west of Kirkbymoorside and about 24 miles from York.  The population of the parish was estimated at 60 in 2012.  As the population of the civil parish was less than 100 it was not separately counted in the 2011 census and was included with the civil parish of Wombleton. Waitby is a small village and civil parish in the Eden district of Cumbria, England.  The parish contains two small villages, Waitby and Smardale, plus the small hamlets of Riddlesay, Stripes and Leases, all of which are in the farmed and enclosured northern part at an elevation of around 200–300m.  The southern half of the parish is mostly heath and unused for agriculture, it rises to Smardale fell; which it includes, at elevations between 300 and 400m.  The civil parish of Ravenstonedale forms the boundary to the south.  The western border with Crosby Garrett civil parish is formed by Scandal Beck.  To the north and east lie Soulby and Kirkby Stephen civil parishes respectively.  The population of the civil parish as measured at the 2011 Census was less than 100.  Details are included in the parish of Crosby Garrett. South Petherwin (Cornish: Paderwynn Dheghow ) is a village and civil parish in east Cornwall, England, United Kingdom.  It is in the Registration District of Launceston.  The civil parish is bounded to the north by the Launceston parishes of St Thomas and St Mary Magdalene, to the east by Lawhitton and Lezant parishes and to the west by Trewen parish.  The population of the parish in the 2001 census was 932.  The district falls in the Altarnun electoral ward but the population of the civil parish at the 2011 Census was almost unchanged at 931. Tilton on the Hill is a village and civil parish (called Tilton) in the Harborough district of Leicestershire.  The population of the civil parish at the 2011 census was 601.  It lies 2 miles north of the A47, on the B6047 to Melton Mowbray.  Halstead civil parish (grid reference [ SK750056] ) was merged with Tilton in 1935, while the deserted medieval village of Whatborough ([ SK772059] ) was merged in 1994.  Marefield remains a separate civil parish, but is part of the Tilton Electoral Ward.  St Peter's Tilton, the Parish Church is in the parish of Halstead, as is the vicarage. Barden is a civil parish in the Craven district of North Yorkshire, England.  The parish is sparsely populated.  It consists of the hamlet of Drebley and a few scattered houses in Wharfedale in the Yorkshire Dales.  At the 2011 Census the population of the civil parish was less than 100.  Details are included in the civil parish of Hazlewood with Storiths.  The parish also includes two areas of moorland, Barden Fell to the east of the River Wharfe and Barden Moor to the west of the river.  Both moorlands are access land, and are popular with walkers.  Barden Fell rises to the prominent peak of Simon's Seat, and Barden Moor includes two scenic 19th century reservoirs.  Much of the parish is on the Bolton Abbey estate. Worth is a civil parish in the Mid Sussex district of West Sussex, a county in southeast England.  It includes the villages of Copthorne and Crawley Down, and covers an area of 1995 ha .  The population at the time of the 2001 census was 9,888.  At the 2011 Census the population of the civil parish had increased to 10,378.  The ecclesiastical parish was one of the larger West Sussex parishes, encompassing the entire area along the West Sussex/Surrey border between the town of Crawley, east of its High Street, and East Grinstead.  The creation of Turners Hill civil parish meant that Worth parish is now only one-third of its original size. Mellor is a civil parish in Ribble Valley, Lancashire, England.  It contains ten listed buildings that are recorded in the National Heritage List for England.  Of these, one is at Grade II*, the middle grade, and the others are at Grade II, the lowest grade.  The parish contains the village of Mellor, and is otherwise rural.  The only listed building in the village is the church.  The other listed buildings are houses and associated structures, farmhouses, and a bridge. Hood Grange is a hamlet and civil parish in the Hambleton district of North Yorkshire, England.  The population of the parish was estimated at 10 in 2010.  The population remained at less than 100 in the 2011 Census.  Details are included in the civil parish of Sutton-under-Whitestonecliffe.  It is located near Thirsk at the foot of Sutton Bank, south of the larger village of Sutton-under-Whitestonecliffe.  It is notable for consisting of only a single household after its population decreased rapidly in the late 19th century.  Hood Grange has existed as a civil parish since 1866, prior to which the area was part of Kilburn. Fernwood is a village and civil parish in the Newark and Sherwood district of Nottinghamshire, England.  The parish, which then included Balderton, had a population of 10,298 in 2001.  It is a suburb of Newark-on-Trent.  The population of the civil parish was given as 2,190 in the 2011 Census.  Balderton was by that time a separate civil parish.
Answer: 57,132