Question: What was the population of one of the suburbs of Melbourne that this steam era railway line ran through?

Context paragraphs:
Rand railway line: The Rand railway line is a closed railway line in New South Wales, Australia.  The line ran for 53km south-west to the town of Rand from the Main South railway line at Henty.

Laupheim–Schwendi railway: The Railway line Laupheim West - Schwendi in Germany connected the town of Laupheim with the then village of Schwendi.  The railway line was opened by the Royal Württemberg State Railways on 17 May 1904.  It branched off from the Württemberg Southern Railway, connecting Ulm with Friedrichshafen.  The length of the railway line was 16 km (approximately 10 miles).  The railway line had the classification number of 4510.  The steam locomotive used on the line, received the nickname "Rottalmolle" by the local population, referring to the course of the railway line through the valley of the river Rot.

Newnes railway line: The Newnes railway line (also called Wolgan Valley Railway) is a closed and dismantled railway line in New South Wales, Australia.  The line ran for 32 mi from the Main Western line to the township of Newnes.  Along the way, it passed through a tunnel now known as the Glowworm Tunnel, because it is famous for its glow-worms.  The tunnel is now contained within the Wollemi National Park.

Willunga railway line: The Willunga railway line ran through the southern Adelaide suburbs from Adelaide railway station to Willunga, over 45 km long (longer than the current Gawler line, 42.2 km ).  The line was opened in Willunga by the Governor of South Australia Sir Henry Galway on 20 January 1915, and initially had 16 stopping places between Adelaide and Willunga.  It closed beyond Hallett Cove in 1969 and was dismantled in 1972.  The Seaford railway line continues from Hallett Cove along a different alignment before rejoining the route of the old line between Seaford Road and Griffiths Drive.

Inner Circle railway line: The Inner Circle was a steam era suburban railway line (later electrified) in Melbourne, Australia.  It served the inner-northern suburbs of Parkville, Carlton North, Fitzroy North, and Fitzroy.  At its closure, it ran from Royal Park station on the Upfield line (Melway map ref: 29 F11) in the west, to a triangular junction with Rushall and Merri stations on today's South Morang line in the east.  (Melway map ref: 30 D11) There was also a branch line to Fitzroy that opened at the same time.

Holbrook railway line: The Culcairn to Holbrook railway line is a short, closed, railway line in New South Wales, Australia.  The line ran from the Main South railway line at Culcairn for 26 km east to the town of Holbrook.

Boorowa railway line: The Boorowa railway line is a closed railway line in New South Wales, Australia.  The line ran for 29km north to the town of Boorowa from the Main South railway line at Galong.

Kew railway line: The Kew railway line was a former railway line in Melbourne, Australia.  The line ran from Hawthorn to Kew.  It was opened on 19 December 1887 and was officially closed on 13 May 1957.  The last train ran on 18 August 1952 after years of decline.

History of rail transport in Myanmar: Rail transport was first introduced in Burma in May 1877, when Lower Burma was a colony of the United Kingdom and a part of British India, with the opening of the Rangoon to Prome line by The Irrawaddy Valley State Railway.  This line, 163 miles long, tracing the course of the Irrawaddy river, was built over three years with labour imported from India, particularly from the areas affected by the Bihar famine of 1873–74.  In 1884, a new company, The Sittang Valley State Railway, opened a 166-mile line along the Sittang River from Rangoon to the town of Toungoo via Pegu.  While the Irrawaddy line was considered to be of commercial importance because it could be used to move rice from the valley to the main port at Rangoon, the Sittang line was of considerable strategic importance because of the proximity of Toungoo to the border with Upper Burma, then a part of the Ava kingdom.  This became evident at the start of the Third Anglo-Burmese War a year after the opening of the railway and during the unrest that followed the war.  The construction cost for the two lines was £1,926,666 and the railway was profitable by 1888 returning more than 5% on the capital expenditure.  With the annexation of Upper Burma, the railway was extended by 220 miles from Toungoo to Mandalay, the fallen capital of the Ava kingdom with the extended railroad opening in 1889.  Following the opening of this section, the Mu Valley State Railway was formed and construction began on a railway line from Sagaing to Myitkyina and connected Mandalay to Shwebo in 1891, to Wuntho in 1893, to Katha in 1895, and to Myitkyina in 1898.  With the opening of this railway, a continuous 724 mile railway line ran from Rangoon to Myitkyina through the Kachin Hills except for a ferry crossing of the Irrawaddy at Sagaing.  The Inwa Bridge at Sagaing, the only one across the Irrawaddy River in Burma, was opened in 1934, with two decks, one for road traffic and one for rail traffic.

Parkville, Victoria: Parkville is an inner suburb of Melbourne, Victoria, Australia, 3 km north of Melbourne's Central Business District.  Its local government areas are the Cities of Melbourne and Moreland.  At the 2016 Census, Parkville had a population of 7,409.

Supporting paragraphs: Inner Circle railway line Parkville, Victoria
Answer: 7,409