Question: What was the population of the city in which S. Lester Ralph was the thirtieth Mayor?

Context paragraphs:
Somerville, Massachusetts: Somerville ( ) is a city located directly to the northwest of Boston, in Middlesex County, Massachusetts, United States.  , the United States Census lists the city with a total population of 75,754 people, making it the most densely populated municipality in New England.  , it was the 16th most densely populated incorporated municipality in the country.  Somerville was established as a town in 1842, when it was separated from Charlestown.  In 2006, the town was named the best-run city in Massachusetts by the "Boston Globe".  In 1972, in 2009, and again in 2015, the city received the All-America City Award.

Ralph Suozzi: Ralph V. Suozzi (born July 21, 1956 in Glen Cove, New York) is a former mayor of Glen Cove, New York.  He was first elected to the post of mayor in 2005, after creating an independent party he named - Glen Cove Voters - after the people who would ultimately choose the next mayor.  Suozzi defeated Republican candidate attorney Drew Fonrose and incumbent two-term Democratic Mayor Mary Ann Holzkamp.  His mantra was and is, "It's about people, not politics."  Suozzi is known for being a hands-on mayor who often responds to citizens personally and can be found responding to the scenes of city emergencies on a regular basis.  During Superstorm Sandy in 2012, he kept City Hall open 24/7 for the first five days after the storm.

Cold Creek County: Nestled in the rural in-betweens of Peterborough and Belleville, Ontario, Brandon Scott (Former lead vocals/acoustic guitar) calls Brighton, population 4,800, home.  Drummer Doug Oliver is from nearby Hastings and its 1,200 population.  Josh Lester (guitar/vocals) and Justin Lester (bass/vocals), the sons of bluegrass master Emory Lester, hail from the outskirts of Frankford, population 2,500.  Lead guitarist Trevor MacLeod, the relative city slicker in the group, is originally from Stratford, Ontario, population 30,000.

S. Lester Ralph: S. Lester Ralph was a Massachusetts Episcopal minister and attorney who served as the thirtieth Mayor of Somerville, Massachusetts, and as a county commissioner of Middlesex County, Massachusetts.

Wellington City mayoral election, 2016: The 2016 Wellington City mayoral election was part of the New Zealand local elections and was held on 8 October to determine the next Mayor of Wellington City.  The incumbent was Celia Wade-Brown, who was first elected in the 2010 mayoral election.  Wade-Brown did not seek re-election.  Her title was pursued by her deputy, Justin Lester, councillors Jo Coughlan, Andy Foster, Helene Ritchie and Nicola Young, former mayor of Porirua City Nick Leggett and independent candidates Keith Johnson and Johnny Overton.

Justin Lester (politician): Justin Lester (born 1979) is a New Zealand businessman and local government politician.  He was elected Mayor of Wellington City in the Wellington City mayoral election, 2016.  Prior to becoming mayor he was Deputy Mayor of Wellington City from 2013 until 2016 and councillor for the Northern Ward since 2010.

John de Berewyk: John de Berewyk (died 1312) was an English judge.  He was entrusted with the charge of the vacant abbey of St. Edmund in 1278–79, and of the see of Lincoln during the interval between the death of Benedict (Richard de Gravesend) in 1279, and the appointment of his successor, Oliver Sutton.  He acted as one of the assessors of the thirtieth for the counties south of the Trent in 1263, and in Michaelmas 1284 is mentioned as treasurer to Queen Eleanor.  In 1294 he was one of her executors.  A memorandum entered on the roll of parliament in 1290 records the delivery by him of a 'roll of peace and concord' made between the chancellor and scholars of the university and the mayor and burgesses of the city of Oxford to the clerk of the king's wardrobe for safe custody.  He was summoned to parliament as a justice between 1295 and 1309, having been appointed a justice itinerant in 1292.  In 1305 he was nominated receiver of petitions to the king in parliament emanating from Guernsey, with power to answer all petitions that did not require the personal attention of the king.  At the time of his death in 1312, de Berewyk possessed estates in Surrey, Essex, Wiltshire, Hampshire, and Norfolk.  He left an infant heir.

Isaac Lester: Isaac "Ike" Lester was mayor of Murray, Utah from 1923–1929.  He was Murray's first mayor to serve three terms.  Lester defeated incumbent Charles Anderson.  Lester's term was noted for improving a lighting system for the city and offering a contract through Utah Power and Light Company for the service.  He was a member of the fraternal order Woodmen of the World.  Prior to his election, he was a Sergeant in 4th Regimental Cavalry in the Spanish–American War and was a chief in the Murray fire department.

Tafo: Tafo is a town in Kumasi Metropolitan District in the Ashanti Region of Ghana near the regional capital Kumasi.  Tafo is the thirtieth most populous settlement in Ghana, in terms of population, with a population of 60,919 people.  Because of the town's population and housing development in recent years, it is debatable whether Tafo is still regarded as a separate town, or already a suburb of Kumasi, the capital of the Ashanti region.  The town is near Kumasi, with a distance of approximately 3.3 kilometers to the center of a similar name sounding village named New Tafo and must be distinguished from Tafo.  Tarkwa is located just 4.6 km away from Tafo.  The city center of Kumasi is located approximately 9.8 kilometers away.  Tafo is one of the urban constituencies of the Kumasi Metropolitan Assembly, the town's parliamentary candidate shall have one direct seat to the Parliament of Ghana.

Melvin B. Breath: Melvin Bernard Breath (March 28, 1881 – July 1, 1950) was an American lawyer and politician who served in the Massachusetts House of Representatives; and on the Board of Aldermen, and as the thirtieth Mayor of Chelsea, Massachusetts.

Supporting paragraphs: S. Lester Ralph Somerville, Massachusetts
Answer: 75,754