Question: What was the population in 2015 of the city in which Rollin Prather was born ? 

Context paragraphs:
Eureka, Kansas: Eureka is a city and county seat of Greenwood County, Kansas, United States.  As of the 2010 census, the city population was 2,633, the 2015 census estimate declined to 2,450.

Demographics of Karachi: Karachi is the largest and most populous city in Pakistan.  The population of Karachi is estimated to be 24 million in 2015.  The population and demographic distribution in the megacity has undergone numerous changes over the past 150 years.  On 14 August 1947, when it became the capital city of Pakistan, its population was about 450,000 inhabitants and was capital of Sindh province.  However, the population rapidly grew with large influx of Muslim refugees after independence in 1947.  By 1951, the city population had crossed one million mark.  in the following decade, the rate of growth of Karachi was over 80 percent.  Today, the city has grown 60 times its size in 1947 when it became the country's first capital.  Although, Islamabad remains the nation's capital since the 1960s, the city's population continues to grow at about 5% per annum, largely thanks to its strong economic base.

Odessa, Texas: Odessa is a city in and the county seat of Ector County, Texas, United States.  It is located primarily in Ector County, although a small portion of the city extends into Midland County.  Odessa's population was 118,918 at the 2010 census making it the 29th-most populous city in Texas; estimates as of July 2015 indicate a population of 159,436 in the city.  It is the principal city of the Odessa Metropolitan Statistical Area, which includes all of Ector County.  The metropolitan area is also a component of the larger Midland–Odessa combined statistical area, which had a 2010 census population of 278,801; a recent report from the United States Census Bureau estimates that the combined population as of July 2015 is 320,513.  In 2014, "Forbes" magazine ranked Odessa as the third fastest-growing small city in the United States.

Oklahoma City: Oklahoma City is the capital and largest city of the U.S. state of Oklahoma.  The county seat of Oklahoma County, the city ranks 27th among United States cities in population.  The population grew following the 2010 Census, with the population estimated to have increased to 631,346 as of July 2015.  As of 2015, the Oklahoma City metropolitan area had a population of 1,358,452, and the Oklahoma City-Shawnee Combined Statistical Area had a population of 1,459,758 (Chamber of Commerce) residents, making it Oklahoma's largest metropolitan area.

Rollin Prather: Rollin Wayne "Rollie" Prather (July 17, 1925 – May 28, 1996) was a Canadian football player who played for the Edmonton Eskimos.  He won the Grey Cup with them in 1954.  Born in Eureka, Kansas, the son of Raymond Lealand and Irene (Bailey) Prather, he previously played football at and attended Kansas State University, graduating with a Bachelor of Science degree in geology.  In 1980, Prather was working as a geologist and served as vice-president of Columbia Gas Development of Canada, Ltd., residing in Edmonton.  Prather died at his home in Calgary in 1996.

Pearland, Texas: Pearland ( ) is a city in the U.S. state of Texas, within the Houston–The Woodlands–Sugar Land metropolitan area.  Most of the city is in Brazoria County, with portions extending into Fort Bend and Harris counties.  As of the 2010 census, the city's population was 91,252, up from a population of 37,640 at the 2000 census.  Pearland's population growth rate from 2000 to 2010 was 142 percent, which ranked Pearland as the 15th fastest growing city in the U.S. during that time period, compared to other cities with a population of 10,000 or greater in 2000.  Pearland is the third largest city in the Houston MSA, and from 2000 to 2010, ranked as the fastest growing city in the Houston MSA and the second fastest growing city in Texas.  As of 2015 the population had risen to an estimated 108,821.

Stef Lang: Stef Lang (born Stephanie Jane Lang, December 30, 1988) is a Canadian singer, songwriter, and producer who resides in "New York City".  Originally from the Vancouver Island town of "Ladysmith, BC", Lang left home at 17 to move to Vancouver, BC and pursue her musical career.  Lang, often booking her own shows, played every pub, bar, club and café she could, while honing her songwriting craft and interning at a recording studio where she learned how to produce.  Known for engaging performances and edgy lyrics, Lang released her first full-length album, "The Underdog", in May 2010, distributed by Hipjoint Music/"Universal Music Canada".  Her hit single, "Mr. Immature" achieved mainstream success when it peaked at #5 on "The Billboard Chart for Canadian Emerging Artists".  Lang is known for her vocal feature on Canadian radio hit "Rollin" by Toronto's rapper ISH, which was released via Warner Music Group in 2012.  In 2013, her vocals were featured on "Last Chance" by EDM artist Kaskade from his Grammy nominated album "Atmosphere".  Lang also co-wrote and was featured on the song "All These Wounds" by EDM artist Ilan Bluestone and BT, which was released May 25, 2015 on the Anjunabeats Worldwide05 Compilation.  Lang's third full-length album "Arrows" is a two part EP series entirely self-recorded and produced from her home studio.  Arrows Pt. 1 was released October 27, 2015 gaining press from reputable blogs including Galore Magazine, All Things Go, Pop Matters among others.  Arrows Pt. 2 is set to release August 16, 2016.

Scott Meredith: Scott Meredith, born Arthur Scott Feldman (1923, New York City, NY – 1993, Manhasset, NY) was a prominent American literary agent, and founder of the Scott Meredith Literary Agency.  His clients included famous and successful writers such as Richard S. Prather, Morris West, Norman Mailer, J.G. Ballard, Arthur C. Clarke, P.G. Wodehouse and Philip K. Dick.

Betty Rollin: Betty Rollin (born January 3, 1936 in New York City), has been an NBC News correspondent and author.

Ellenbrook, Western Australia: Ellenbrook is a northeastern suburb of Perth, Western Australia, about 21 km from Perth's Central business district (CBD), located within the City of Swan.  Ellenbrook, and its neighbouring suburbs of The Vines and Aveley, are unusual for Perth in being a significant distance from neighbouring suburbs.  Given this relative isolation and the distance from the CBD, Ellenbrook has been designed and developed as a self-sustainable community.  At June 2015 the estimated urban population for Ellenbrook and surrounds was 41,681.  At the time of the 2011 census there were 16,284 people living in the gazetted suburb.  It is envisioned that Ellenbrook will eventually become a satellite city, with a population of 80,000, however a more modest population prediction of 30,000 has been set for c. 2012.  In June 2010 Rita Saffioti MLA stated that the population of Ellenbrook and neighbouring areas now stood at "over 25,000".  Current City of Swan estimates forecast the population to increase to 37,150 by 2016 and 44,185 by 2021.  Population in the City of Swan's nearby Urban Growth Corridor (roughly east of Whiteman Park) is forecast to reach 14,668 in the same period.

Supporting paragraphs: Rollin Prather Eureka, Kansas
Answer: 2,450