Question: What constituency in North East Lincolnshire was mayored by Richard Barber in 1388?

Context paragraphs:
Great Grimsby (UK Parliament constituency): Great Grimsby is a constituency in North East Lincolnshire represented in the House of Commons of the Parliament of the United Kingdom since May 2015 by Melanie Onn of the Labour Party.

Grimsby Auditorium: Grimsby Auditorium is a theatre situated on Cromwell Road, in Grimsby, North East Lincolnshire.  With a seated audience capacity of 1,200 the Grimsby Auditorium is the largest professional theatre in Lincolnshire, and one of the larger theatres in the East of England.  Built in 1995, it is managed by the venues division of Ambassador Theatre Group on behalf of North East Lincolnshire Council.

North East Lincolnshire Council election, 2012: The 2012 North East Lincolnshire Council election took place on 3 May 2012 to elect members of North East Lincolnshire Council in England.  This was on the same day as other United Kingdom local elections, 2012.

Old Clee: Old Clee is located in the Clee Road (A46) and Carr Lane area of eastern Grimsby, North East Lincolnshire, England, and adjoins the neighbouring town of Cleethorpes, to which it has historic links.  It is in the Heneage ward of the North East Lincolnshire Unitary Council.  Previously a separate village, its parish church of Holy Trinity and Saint Mary, claimed to be the oldest building in Grimsby, has a Saxon tower dating from 1050 AD.  Located in the area are the Old Clee infants/junior schools (Colin Avenue) and the Havelock Academy (Holyoake Road).  Nearby is the King George V Stadium.

North East Lincolnshire Council election, 2016: The 2016 North East Lincolnshire Council election took place on 5 May 2016 to elect members of North East Lincolnshire Council in England.  This was on the same day as other local elections.

North East Lincolnshire Council election, 2014: The 2014 North East Lincolnshire Council election took place on 22 May 2014 to elect members of North East Lincolnshire Council in England.  This was on the same day as other local elections.

North East Lincolnshire Council: North East Lincolnshire Council is the local authority of North East Lincolnshire.  It is a unitary authority, having the powers of a non-metropolitan county and district council combined.  It provides a full range of local government services including Council Tax billing, libraries, social services, processing planning applications, waste collection and disposal, and it is a local education authority.

West Marsh: West Marsh is an area located in the northern part of Grimsby, North East Lincolnshire, England, and is close to Grimsby town centre.  Its northern and eastern boundaries are formed by the Alexandra Dock.  At its western edge is the Pyewipe industrial area, and at the south the railway line and Cromwell Road.  West Marsh is split centrally by the southeast–northwest flow of the River Freshney.  West Marsh is a ward of the North East Lincolnshire Unitary Council with a population taken at the 2011 census of 7,754.

Nunsthorpe: Nunsthorpe (sometimes known locally as 'The Nunny', or by its nickname of Garden City) is a suburb and housing estate in the western part of Grimsby, North East Lincolnshire, England.  It is situated between Laceby Road (A46) and Scartho Road (A1243), which respectively form its northern and eastern boundaries.  The population is listed in the South ward of the North East Lincolnshire Unitary Council.

Richard Barber (MP): Richard Barber was the member of Parliament for Great Grimsby in 1388 and mayor of that town.

Supporting paragraphs: Richard Barber (MP) Great Grimsby (UK Parliament constituency)
Answer: Great Grimsby