Question: What city of origin does Ermine Street and Lindum Colonia have in common?

Context paragraphs:
Papworth Everard: Papworth Everard is a village in Cambridgeshire, England.  It lies ten miles west of Cambridge and six miles south of Huntingdon, having along its centre Ermine Street, the old North Road, the Roman highway that for centuries served as a major artery from London to York, which is now the A1198.  A bypass now means that most traffic can avoid Ermine Street, and it is comprehensively traffic-calmed.

Ermine Street Guard: The Ermine Street Guard is a British classical reenactment and living history society, founded in 1972.  Its main objective is to study and display weapons, tactics and equipment of the Roman army of the first Century AD.  It was named after Ermine Street, a major Roman road from London to Lincoln and York.

Lindum Colonia: Lindum Colonia, was the Roman name for the settlement which is now the City of Lincoln in Lincolnshire.  It was founded as a Roman Legionary Fortress during the reign of the Emperor Nero (58-68) or possibly later.  Evidence from Roman tombstones suggests that Lincoln was first garrisoned by the Ninth Legion, "Hispana" which probably moved from Lincoln to found the fortress at York around c.71 A.D. Lindum was then garrisoned by the Second Legion "Aduitrix", which then went on to Chester in 77-8 A.D.

Roman Ridge: The Roman Ridge is that part of the Roman road of Ermine Street located in the Doncaster area of South Yorkshire, England.  Although in places, Ermine Street follows the modern Great North Road (now numbered the A638), there is a stretch between Sunnyfields and Red House which is known as the Roman Ridge.

Fosse Way: The Fosse Way was a Roman road in England that linked Exeter ("Isca Dumnoniorum") in South West England to Lincoln ("Lindum Colonia") in Lincolnshire, via Ilchester ("Lindinis"), Bath ("Aquae Sulis"), Cirencester ("Corinium") and Leicester ("Ratae Corieltauvorum").

Craig Spence (archaeology): Craig Spence is an historian and archaeologist currently working at Bishop Grosseteste University in Lincoln, Lincolnshire as a lecturer on the College's History and Heritage courses.  Spence was employed as an archaeologist with The Museum of London. He continues with practical archaeology every summer,directing an excavation of a Roman Villa site just outside the old Lindum Colonia as part of the Lincoln Archaeological Field School.

King Street (Roman road): King Street is the name of a modern road on the line of a Roman road.  It runs on a straight course in eastern England, between the City of Peterborough and South Kesteven in Lincolnshire.  This English name has long been applied to the part which is still in use and which lies between Ailsworth Heath, in the south and Kate's Bridge, in the north.  The old road continued to Bourne thence north-westwards to join Ermine Street south of Ancaster.  This part of Ermine Street is called High Dike.  In the south, King Street joined Ermine Street close to the River Nene, north of "Durobrivae".  The whole is I.D. Margary's Roman road number 26.  (Margary pp.232-234)

Flavia Caesariensis: Flavia Caesariensis (Latin for "The Caesarian province of Flavius"), sometimes known as Britannia Flavia, was one of the provinces of the Diocese of "the Britains" created during the Diocletian Reforms at the end of the 3rd century.  It was probably created after the defeat of the usurper Allectus by Constantius Chlorus in  296 and was mentioned in the c. 312 Verona List of the Roman provinces.  It seems to have been named after Chlorus's family and was probably located beside Maxima Caesariensis, but their positions and capitals remain uncertain.  At present, most scholars place Flavia Caesariensis in the southern Pennines, possibly reaching the Irish Sea and including the lands of the Iceni.  Its capital is sometimes placed at Lindum Colonia (Lincoln).

Ermine Street: Ermine Street is the name of a major Roman road in England that ran from London ("Londinium") to Lincoln ("Lindum Colonia") and York ("Eboracum").  The Old English name was "Earninga Straete" (1012), named after a tribe called the "Earningas", who inhabited a district later known as "Armingford Hundred", around Arrington, Cambridgeshire and Royston, Hertfordshire.  "Armingford", and "Arrington" share the same Old English origin.  The original Roman name for the route is unknown.  It is also known as the Old North Road from London to where it joins the A1 Great North Road near Godmanchester.

Wadesmill: Wadesmill is a hamlet in Hertfordshire, England, located on the north side of the River Rib with an estimated population of 264.  At the 2011 Census the population of the hamlet was included in the civil parish of Thundridge.  Running through the center of Wadesmill is the road formerly known as the A10 - the main London to King's Lynn (via Cambridge) road - but now that the A10 by-pass has been built, Wadesmill and surrounding villages have returned to the quiet of former times.  The route that was formerly the A10 is an ancient one with portions of it following the line of the Roman Road Ermine Street.  Ermine street also figures as the former main street in Wadesmill's adjacent village Thundridge.

Supporting paragraphs: Ermine Street Lindum Colonia
Answer: Roman