Question: This railway station 7.9 kilometres from Adelaide station is situated in what city?

Context paragraphs:
Edwardstown, South Australia: Edwardstown is an inner southern-western suburb located 6 km southwest of Adelaide in the City of Marion.

South Brighton railway station, Adelaide: South Brighton railway station is a former railway station on the Seaford line in Adelaide, South Australia.  It was located about 15.8 kilometres from Adelaide station.  The station closed in 1976, and was demolished shortly after, A newer station was built 200 metres to the south of that station in the same year.  The old subway that went below the old station was in use until the early 1990s, but has now been filled in and replaced with a ground level passenger walkway.  Adjacent to the old station is a disused delicatessan (now residential) building that served the station's passengers, and then the local population until the early 1990s.

Balhannah railway station: Balhannah railway station is a disused railway station on the Adelaide-Wolseley line.  The station is in the Adelaide Hills town of Balhannah, and is located 45.8 kilometres from Adelaide station.

Bowden railway station: Bowden railway station is located on the Grange and Outer Harbor lines.  Situated in the inner-city Adelaide suburb of Bowden, it is 2.7 kilometres from Adelaide station.  The station is currently under reconstruction, with the original platforms long closed and demolished; the southbound platform was closed and demolished in April 2017, and the northbound in September of the same year.  The original station's 1856 brick and stone station building on the northbound platform remains, which now houses The Loose Caboose Café.

New Delhi railway station: The New Delhi Railway Station (station code NDLS), situated between Ajmeri Gate and Paharganj is the main railway station in Delhi.  It is the fourth busiest Railway Station in the country in terms of frequency of trains after Kanpur Central, Vijayawada Junction and Delhi Junction and most busiest Railway station in India in terms of passenger movement.  Around 185 trains starts, ends, or passes through the station daily and handles 500,000 passengers daily with 16 platforms.  The New Delhi railway station holds the record for the largest route interlocking system in the world along with the Kanpur Central Railway Station i.e. 48.  The station is about two kilometres north of Connaught Place, in central Delhi.

Hilra railway station: Hilra railway station is a former railway station on the defunct Penfield line which is located in the northern Adelaide suburb of Salisbury North.  It is located 21.7 kilometres from the Adelaide station. The station was located parallel to Langford Terrace, adjacent to the freight train line, and inline roughly to Compton Street.

Mile End Goods railway station: Mile End Goods railway station was a railway station dedicated to goods located in the suburb of Mile End on the western fringe of the Adelaide city centre in South Australia.  It was located 2.9 kilometres from Adelaide station.

Woodville railway station, Adelaide: Woodville railway station is the junction station for the Grange and Outer Harbor lines with the lines diverging immediately north of the station.  Situated in the western Adelaide suburb of Woodville, it is 7.5 kilometres from Adelaide station.  It has auto pedestrian gates and lights, the only location with these lights on the line.  Platform 3 has a small kiosk, built around 2006, that sells refreshments and tickets.

Edwardstown railway station: Edwardstown railway station is located on the Seaford and Tonsley lines.  Situated in the inner south-western Adelaide suburb of Edwardstown, it is 7.9 kilometres from Adelaide station.

Ochira railway station: Ochira railway station (Code:OCR) is an 'E-Class' railway station, situated near the city of Kollam in Kollam district of Kerala.  Ochira railway station is situated at the borders of Kollam district.  It falls under the Thiruvananthapuram railway division of the Southern Railway Zone, Indian Railways.  The railway station is situated between Karunagappalli and Kayamkulam.  The nearest important major rail head is Kollam Junction railway station.  The other major railway stations near oachira are Kayamkulam Junction railway station and Karunagappalli railway station.

Supporting paragraphs: Edwardstown railway station Edwardstown, South Australia
Answer: Marion