Question: Thurlby, North Kesteven is farther south-west than Witham St Hughs of what city?

Context paragraphs:
Washingborough: Washingborough is a village 3 mi east from Lincoln city centre, in the North Kesteven district of Lincolnshire, England.  The population at the census 2001 was 3,356, increasing to 3,482 at the 2011 census.  It is situated on the lower slopes of Lincoln Cliff limestone escarpment where the River Witham breaks through the Lincoln Edge.

Harmston: Harmston is a village and civil parish in the North Kesteven district of Lincolnshire, England.  It is situated just west off the A607, and 5 mi south from the city and county town of Lincoln.  It sits on the Lincoln Cliff overlooking the River Witham valley.

Dogdyke: Dogdyke is a hamlet in the North Kesteven district of Lincolnshire, England.  It is situated approximately 2 mi south from Tattershall, and at the confluence of the Rivers Bain and Witham, and close to where the River Slea joins the Witham.

North Kesteven School: North Kesteven School is a co-educational academy school on "Moor Lane", off the A1434 in North Hykeham which is in North Kesteven, Lincolnshire, England.

Witham St Hughs: Witham St Hughs is a village and civil parish in the North Kesteven district of Lincolnshire, England.  The population of the civil parish (including Thurlby) was 2,356 at the 2011 census.  It is situated less than 0.5 mi south from the A46 road, geographically 8 mi south-west from the city and county town of Lincoln, and 7 mi north-east from the town of Newark-on-Trent.

North Kesteven District Council: North Kesteven District Council is the local authority for North Kesteven in Lincolnshire.

North Kesteven: North Kesteven is a local government district in the East Midlands.  Just over 100 mi north of London, it is east of Nottingham and south of Lincoln.  North Kesteven is one of seven districts in Lincolnshire, England and is in the centre of the County.  Its council, North Kesteven District Council, is based in Sleaford in the former offices of Kesteven County Council.

Thurlby, South Kesteven: Thurlby is a village and civil parish in the South Kesteven district of Lincolnshire, England.  It is situated just west of the A15 road, 2 mi south from the town of Bourne, and on the edge of the Lincolnshire Fens.  It is sometimes referred to as "Thurlby by Bourne" to distinguish it from other villages in Lincolnshire with the same name.  Thurlby and the hamlet of Northorpe to its north are conjoined.  The parish had a population of 2,136 at the 2001 census, although this had increased to 2,153 at the 2011 census.

Obthorpe: Obthorpe is a hamlet in the civil parish of Thurlby, in the South Kesteven district of Lincolnshire, England.  It is situated 3 mi south from Bourne, 6 mi north-east from Stamford and less than 1 mi west from the A15.  Thurlby is the nearest village, 1 mi to the north.

Thurlby, North Kesteven: Thurlby is a village and civil parish in the North Kesteven district of Lincolnshire, England, about 9 mi south-west of the city of Lincoln and about 9 mi north-east of the town of Newark-on-Trent.  It is most notable for Thurlby Hall, home of the Bromhead baronets.  The population is included in the civil parish of Witham St Hughs.

Supporting paragraphs: Thurlby, North Kesteven Witham St Hughs
Answer: Lincoln