Question: Which English Coast Line is served by both Corkickle railway station and Whitehaven railway station?

full_context: Document 1: West Cumberland Hospital: West Cumberland Hospital is a hospital in Hensingham, a suburb of Whitehaven in Cumbria, England. It serves 140,000 residents of West Cumbria. It is under the management of the North Cumbria University Hospitals NHS Trust, who also manage the Cumberland Infirmary in Carlisle. The Trust has been put in Special Measures by the Care Quality Commission. West North and East Cumbria is one of three Success Regime areas in England, where serious problems in the health and care system are being addressed in expedited programs set up by NHS England.
Document 2: Ravenglass (R&amp;ER) railway station: Ravenglass Heritage Railway Station is the Western terminus of the Ravenglass and Eskdale Railway. It is situated to the east of main line railway station, which is itself a station on the Cumbrian Coast Line. The facilities at the railway station include toilets, under-cover platforms, booking office and café. The railway station complex incorporates 2 locomotive sheds, a carriage shed, a signal box, managerial offices and 2 camping coaches; along with the railway station itself.
Document 3: Penychain railway station: Penychain railway station, formerly known as (and still sometimes referred to as) Butlins Penychain railway station, is located by an over bridge at Pen Y Chain on the Llŷn Peninsula in Gwynedd, Wales. This railway station is an unstaffed halt on the Cambrian Coast Railway with passenger services to Pwllheli, Porthmadog, Harlech, Barmouth, Machynlleth and Shrewsbury. For many years the station served the large Butlins Holiday Camp at Penychain.
Document 4: Carlisle railway station: Carlisle railway station, also known as Carlisle Citadel station, is a Grade II* listed railway station serving the city of Carlisle, Cumbria, England, and is a major station on the West Coast Main Line, lying 102 mi south east of Glasgow Central , and 299 mi north north west of London Euston . It is also the northern terminus of the celebrated Settle and Carlisle Line – notionally (and historically) a continuation of the Midland Main Line from Leeds , Sheffield and ultimately London St Pancras .
Document 5: Colne railway station: Colne railway station serves the Lancashire mill town of Colne, England, which is situated close to Pendle Hill. The station, which is managed by Northern, is the eastern terminus of the East Lancashire Line. Trains from Blackpool South run through Preston and Blackburn to Burnley and Colne.
Document 6: Corkickle, Cumbria: Corkickle is a hamlet in Cumbria, England. It is served by Corkickle railway station.
Document 7: Green Road railway station: Green Road railway station serves The Green, in Cumbria, England, a village some 3 mi north of Millom and the rural parish of Millom Without. The railway station is a request stop on the scenic Cumbrian Coast Line north of Barrow-in-Furness.
Document 8: Cumbrian Coast line: The Cumbrian Coast line is a rail route in North West England, running from Carlisle to Barrow-in-Furness via Workington and Whitehaven. The line forms part of Network Rail route NW 4033, which continues (as the Furness line) via Ulverston and Grange-over-Sands to Carnforth, where it connects with the West Coast Main Line.
Document 9: Whitehaven R.L.F.C.: Whitehaven R.L.F.C. is a semi-professional rugby league club playing in Whitehaven in west Cumbria. They play in Kingstone Press League 1. Their stadium is called the Recreation Ground (known locally as the Recre).
Document 10: Kirkby Thore railway station: Kirkby Thore railway station was a railway station situated on the Eden Valley Railway between Penrith and Kirkby Stephen East. It served the village of Kirkby Thore. The station opened to passenger traffic on 9 June 1862, and closed on 7 December 1953. The track has been dismantled and the A66 road now uses the route of the railway at this point. The former A66 route past the station is now a haulage yard.
Document 11: Whitehaven railway station: Whitehaven railway station serves the town of Whitehaven in Cumbria, England. The railway station is a stop on the scenic Cumbrian Coast Line 63 km south west of Carlisle.
Document 12: Corkickle railway station: Corkickle railway station serves the Whitehaven suburb of Corkickle in Cumbria, England. The railway station is a request stop on the scenic Cumbrian Coast Line 68 km south west of Carlisle. The station opened in 1855 and is at the southern end of the 1219 m tunnel from Whitehaven railway station. At times it was known as 'Whitehaven Corkickle' station.
Document 13: Carnforth railway station: Carnforth railway station serves the town of Carnforth in Lancashire, England. The building was designed by architect William Tite and was used as a location in the 1945 film "Brief Encounter". It is now operated by Northern and situated 6 mi north of on the West Coast Main Line.
Document 14: Hest Bank railway station: Hest Bank railway station was opened by the Lancaster and Carlisle Railway (L&CR) three miles north of Lancaster Castle railway station. The line had been authorised in 1844 and a station was proposed for the village of Hest Bank, Lancashire, the following year. It opened in 1846 along with the line. The station continued to serve the village of Hest Bank until its closure in 1969. The site remains notable as being the point at which the present-day West Coast Main Line (WCML) comes nearest to the west coast. Views of Morecambe Bay can be glimpsed from trains on this section of the line.
Document 15: Disused railway stations on the Cornish Main Line: There are seventeen disused railway stations on the Cornish Main Line between Plymouth in Devon and Penzance in Cornwall, England. The remains of nine of these can be seen from passing trains. While a number of these were closed following the so-called "Beeching Axe" in the 1960s, many of them had been closed much earlier, the traffic for which they had been built failing to materialise.
ground_truth: Cumbrian Coast Line