Question: The Stevenage railway station and Watton-at-Stone railway station both serves which town?

full_context: Document 1: Doncaster railway station: Doncaster railway station serves the town of Doncaster, in South Yorkshire, England. It is situated on the East Coast Main Line 156 mi north of London King's Cross and managed by Virgin Trains East Coast. It is a major passenger interchange between the East Coast Main Line and Cross Country Route and local services running across the North of England. It is also the point for which Virgin Trains East Coast services from London divide, either branching off to Leeds or continuing north to Scotland via Newcastle and the North East.
Document 2: Hertford Loop Line: The Hertford Line (also known colloquially as the Hertford Loop) is a branch of the East Coast Main Line, part of the Northern City Line commuter route to London for Hertford and other Hertfordshire towns and an occasional diversion route for the main line. The line is part of the Network Rail Strategic Route 8, SRS 08.03 and is classified as a London and South East Commuter line.
Document 3: Stevenage railway station: Stevenage railway station serves the town of Stevenage in Hertfordshire, England. The station is 27 mi north of London King's Cross on the East Coast Main Line. Stevenage is managed and served by Great Northern. It is also served by Hull Trains and Virgin Trains East Coast.
Document 4: Berkhamsted railway station: Berkhamsted railway station is in the town of Berkhamsted, Hertfordshire, England. It is located just beside Berkhamsted Castle, overlooking the Grand Junction Canal. The station is 28 mi north west of London Euston on the West Coast Main Line. London Midland operates services to London, Northampton and many other destinations.
Document 5: Grantham railway station: Grantham railway station serves the town of Grantham in Lincolnshire, England and lies on the East Coast Main Line (ECML) 105.5 mi north of London King's Cross.
Document 6: Watford Stadium Halt railway station: Watford Stadium railway station is a disused railway station in Watford, Hertfordshire, United Kingdom on the branch line from Watford Junction to Croxley Green . It served Vicarage Road stadium, home of Watford F.C., and was open only on match days.
Document 7: St Albans City railway station: St Albans City railway station, also shortened to St Albans, is one of two railway stations in St Albans, Hertfordshire, England, the other being St Albans Abbey railway station. City station is the more important of the two stations, as it serves London, Gatwick Airport, Luton Airport and Brighton. It is located 0.5 mi east of the city centre, on the Midland Main Line and served by Thameslink trains on the Thameslink route.
Document 8: Weedon railway station: Weedon railway station was a railway station situated to the north of and serving the village of Weedon in Northamptonshire, England. It was situated on the West Coast Main Line, and was also the starting point of the Weedon to Leamington Spa branch line, one platform of the station was dedicated for terminating branch line trains. The station also housed a busy goods depot which was attacked by German aircraft during the Second World War.
Document 9: Virgin Trains East Coast: Virgin Trains East Coast is a train operating company in the United Kingdom that operates the InterCity East Coast franchise on the East Coast Main Line between London, Yorkshire, the North East and Scotland. It commenced operations on 1 March 2015, taking over from East Coast. It is a joint venture between Stagecoach (90%) and Virgin Group (10%).
Document 10: Abbey line: The Abbey line, also called the St Albans Abbey branch line, is a railway line from Watford Junction to St Albans Abbey. The 6.5 mi route passes through town and countryside in the county of Hertfordshire, just outside the boundaries of the Oyster Card and London fare zones. Its northern terminus in St Albans Abbey is located in the south of the city, around 1.2 km away from the larger St Albans City railway station on the Thameslink line.
Document 11: Watton-at-Stone railway station: Watton-at-Stone railway station serves the village of Watton-at-Stone in Hertfordshire, England. It is on the Hertford Loop branch line between Hertford North and Stevenage and is served by trains operated by Great Northern.
Document 12: Hemel Hempstead railway station: Hemel Hempstead railway station is on the West Coast Main Line, on the western edge of the town of Hemel Hempstead, Hertfordshire, England. The station is 24+1/2 mi north-west of London Euston on the West Coast Main Line. Hemel Hempstead is managed by London Midland and all train services are operated by London Midland and Southern.
Document 13: Great Northern Route: The Great Northern Route (formerly known as Great Northern Electrics) is the name given to suburban rail services run on the southern end of Britain's East Coast Main Line and its associated branches. Services operate to or from London King's Cross and Moorgate in London. Destinations include Hertford North , Welwyn Garden City , Stevenage , Peterborough , Cambridge and King's Lynn . Services run through parts of Greater London, Hertfordshire, Bedfordshire, Cambridgeshire and Norfolk.
Document 14: St Albans Abbey railway station: St Albans Abbey railway station in St Albans, Hertfordshire, England is about 0.6 mi south of the city centre in the St Stephen's area. It is the terminus of the Abbey Line from Watford Junction, part of the London Midland franchise. It is one of two stations in St Albans, the other being the much larger and busier St Albans City.
Document 15: Theobalds Grove railway station: Theobalds Grove railway station serves Waltham Cross in Hertfordshire, England. It is part of the Lea Valley Lines network, and train services are provided by London Overground. The station is named after the nearby Theobalds Park.
ground_truth: serves the town of Stevenage in Hertfordshire, England