Question: Which Lancashire river passes through the small town of Padiham and Burnley?

full_context: Document 1: Brierfield, Lancashire: Brierfield is a small town and civil parish in the Borough of Pendle Lancashire, England. It is 2.5 mi north east of Burnley, 1 mi south west of Nelson, and 0.5 mi north east of Reedley. It has a population of 8,200, reducing marginally to 8,193 at the 2011 Census.
Document 2: Paythorne: Paythorne is a small village and civil parish in Ribble Valley, Lancashire, England. It is situated alongside the River Ribble, north-east of Clitheroe, and on the boundary with North Yorkshire. Other parishes adjacent to Paythorne are Halton West, Nappa (both in North Yorkshire), Newsholme, Horton, Gisburn, Sawley, Bolton-by-Bowland and Gisburn Forest (all in Lancashire). The nearest town is Barnoldswick, situated 7 km south-east of the village. Paythorne is on the edge of the Forest of Bowland Area of Outstanding Natural Beauty, although only a small area in the west of the parish is within the area's boundary. The Ribble Way long distance walk passes through the village.
Document 3: Fulledge Recreation Ground: Fulledge Recreational Ground, situated in the East Lancashire town of Burnley in the United Kingdom, is used for events such as festivals, fairs, etc. Fulledge is across the River Calder from Unity College and close to the grounds of Towneley Park. It is surrounded by streets of terraced houses on one side and Towneley Park on the other. Turf Moor, the home of Burnley Football Club, can be seen from the ground. The ground has a children's play area.
Document 4: Ribble Valley line: The Ribble Valley line is a railway line that runs from Manchester Victoria through Blackburn to the small market town of Clitheroe in Lancashire. Regular passenger services normally only run as far as Clitheroe, but occasional passenger services run along the line through north Lancashire towards the Yorkshire town of Hellifield, where it joins the Settle-Carlisle Railway. The line passes over the distinctive 48 span Whalley Viaduct.
Document 5: Padiham: Padiham is a small town and civil parish on the River Calder, about 3 mi west of Burnley and south of Pendle Hill, in Lancashire, England. It is part of the Borough of Burnley, but has its own town council with varied powers. Padiham was originally a rural village lying by the River Calder. It is still surrounded by attractive countryside on an arc running from the north-west to the north-east in the foothills of Pendle Hill.
Document 6: Whalley railway station: Whalley railway station serves the village of Whalley in Lancashire, England. The station lies on the Ribble Valley Line 7+1/4 mi north of Blackburn. The station has two platforms, slightly offset from each other. It is unstaffed, with shelters on each platform. Immediately beyond its eastern end, the line crosses the River Calder on a 678 yd long, brick viaduct of 48 arches.
Document 7: Lancaster Canal: The Lancaster Canal is a canal in North West England, originally planned to run from Westhoughton in Lancashire to Kendal in south Cumbria (then in Westmorland). The section around the crossing of the River Ribble was never completed, and much of the southern end leased to the Leeds and Liverpool Canal, of which it is now generally considered part.
Document 8: Sabden: Sabden is a medium to large village and civil parish in the Ribble Valley, Lancashire. Sabden is located south of Pendle Hill, in a valley about three miles north west of Padiham. The parish is 2,451 acres. It lies in the Forest of Pendle section of the Forest of Bowland Area of Outstanding Natural Beauty.
Document 9: Ribble Valley: 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.
Document 10: River Calder, Lancashire: The River Calder is a major tributary of the River Ribble, starting in Cliviger close to Burnley in Lancashire, England and is around 15 mi in length. Its source is very close to that of the West Yorkshire river with the same name, and that of the River Irwell. It flows through Towneley Park passing Unity College and Fulledge Recreation Ground. It passes through a culvert in the Burnley Embankment on the Leeds and Liverpool Canal and on through Burnley town centre where it is joined by the River Brun at Active Way. It then flows north through the site of Burnley College and out of the town, where it is joined by Pendle Water before turning west past Ightenhill and Gawthorpe Hall and through the town of Padiham. It flows through Altham and Whalley, passing the ruins of Whalley Abbey, then being crossed by the red brick Whalley Viaduct. It meets the Ribble near Great Mitton.
Document 11: Pendle Hill: Pendle Hill is located in the east of Lancashire, England, near the towns of Burnley, Nelson, Colne, Clitheroe and Padiham. Its summit is 557 m above mean sea level. It gives its name to the Borough of Pendle. It is an isolated hill, separated from the Pennines to the east, the Bowland Fells to the northwest, and the West Pennine Moors to the south. It is included in detached part of the Forest of Bowland Area of Outstanding Natural Beauty (AONB).
Document 12: Gawthorpe (ward): Gawthorpe is an electoral ward in the non-metropolitan district of Burnley in Lancashire, England. The population of the Burnley Ward at the 2011 census was 6,148. The ward covers the majority of the town of Padiham, meaning it is a largely urban area. It is part of the Padiham and Burnley West electoral division of Lancashire County Council, the Burnley UK Parliament constituency and the North West England European Parliament constituency.
Document 13: Brontë Waterfall: The Brontë Waterfall is a small waterfall located about a mile south west of Stanbury, near Haworth, West Yorkshire, England. The area surrounding the waterfall is mainly moorland and farmland but is part of Brontë Country. It is an area of outstanding beauty and famous for its association with the Brontë sisters. Below the falls can be found an old stone bridge named "Brontë Bridge" across South Dean Beck. The bridge was destroyed in a flash flood in May 1989 and rebuilt in 1990.
Document 14: Listed buildings in Padiham: Padiham is a town and a civil parish in the borough of Burnley, Lancashire, England. The parish contains 31 buildings that are recorded in the National Heritage List for England as designated listed buildings. Of these, two are listed at Grade II*, the middle grade, and the others are at Grade II, the lowest grade. The parish consists of the town of Padiham and surrounding countryside.
Document 15: Downham, Lancashire: Downham is a village and civil parish in Lancashire, England. It is in the Ribble Valley district and as of the United Kingdom 2001 census has a population of 156, increasing at the 2011 Census to 214. The village is on the north side of Pendle Hill off the A59 road about 3 mi from Clitheroe. Much of the parish, including the village is part of the Forest of Bowland Area of Outstanding Natural Beauty (AONB). It adjoins the Ribble Valley parishes of Rimington, Twiston, Worston, Chatburn and Sawley, and the Pendle parish of Barley-with-Wheatley Booth.
ground_truth: Calder