Question: David G. Mugar is a businessman from the town in what Massachusetts county?

Context paragraphs:
Storrow Drive: Storrow Drive is a major crosstown parkway in Boston, Massachusetts, running east and north along the Charles River to Leverett Circle.  It is restricted to cars; trucks and buses are not permitted on it.  The road, legally known as James Jackson Storrow Memorial Drive, officially ends at its eastward junction with Route 28 (near Arlington Street) and continues as David G. Mugar Way (formerly Embankment Road), concurrent with Route 28.

David G. Booth: David G. Booth (born 1946) is an American businessman.  He is the co-founder and co-CEO of Dimensional Fund Advisors (along with Rex Sinquefield and Eduardo Repetto, respectively).  In 2008, he donated $300 million to the University of Chicago Graduate School of Business (equivalent to $ million in 2016 ), which is the largest donation ever given to a business school.

David Gowan: David D. Gowan was born in 1840 in Bervie, Kincardineshire, Scotland to Alexander and Jane (Moir) Gowan(s).  On the 1920 census he told the census taker that he was born on the Atlantic Ocean but at this time there is no evidence his parents ever left Scotland.  In 1900, David was living with his sister Ann's son, David G. Goodfellow and his family on Natural Bridge Road in Gila County, Arizona.  The well-known pioneer had been living alone in his cabin where he pursued his lifetime occupation of prospecting.  David Gowan died in January 1926.  When deputy sheriff Jim Kline on his regular two week's visit, couldn't locate Gowan at his little cabin, he looked around and secured the help of a posse, which found David's body in Deer Creek.  The remains were buried just where they were found beside the creek.  Today, the grave site is marked and preserved.

Readercon: Readercon is an annual science fiction convention, held every July in the Boston, Massachusetts area, in Burlington, Massachusetts.  It was founded by Bob Colby and statistician Eric Van in the mid-1980s with the goal of focusing almost exclusively on science fiction/fantasy/slipstream/speculative fiction in the written form (on the rare occasion that there is a discussion held about non-written science fiction, it will have a tongue-in-cheek title such as "Our biannual media panel").  Past guests of honor have included authors such as Greer Gilman, Gene Wolfe, Octavia Butler, Samuel R. Delany, Karen Joy Fowler, Brian Aldiss, Nalo Hopkinson, Joe Haldeman, Caitlín R. Kiernan, Peter Straub, and China Miéville, and editors such as Ellen Datlow and David G. Hartwell.  The convention also makes a point of honoring a deceased author as the Memorial Guest of Honor.  In 2009, for instance, the guests of honor were the living writers Elizabeth Hand and Greer Gilman and the memorial guest of honor was Hope Mirrlees.

Murcray Heights: Murcray Heights ( ) is a cluster of prominent heights that rise to 3091 m at the south end of Sickle Ridge, Royal Society Range, Victoria Land.  It is named after the Murcray brothers, David G. and Frank H., and Frank J. Murcray (son of David G.), University of Denver, long term specialists in infrared spectroscopy in Antarctica.

Stead Foundation: The David G. Stead Memorial Wild Life Research Foundation of Australia (or Stead Wildlife Foundation) was established in 1963 as a memorial to David G. Stead - and one of Australia's pioneer conservationists.  The Foundation boasts a list of leading conservationists as supporters and board members.  The Stead Foundation is a project based organisation.  Its first and most enduring project is Wirrimbirra Sanctuary established in 1963.  This legacy continues in projects for advocacy, education and heritage through community engagement.

Levi S. Gould: Levi Swanton Gould (March 27, 1831 – March 22, 1917) was an American businessman and politician who served as a member, and chairman of the Middlesex County, Massachusetts county commission, and as the first mayor of Melrose, Massachusetts.

David G. Mugar: David G. Mugar is an Armenian-American businessman and philanthropist from Belmont, Massachusetts.  He is CEO and chairman of Mugar Enterprises.  His father, Stephen P. Mugar was the founder of the Star Market supermarket chain, and was also a major Boston-area philanthropist.  David Mugar attended the Cambridge School of Weston, and then Babson College.

The Voluntary City: The Voluntary City: Choice, Community, and Civil Society is an Independent Institute-published book, edited by David T. Beito, about communities with private provision of municipal services.  Contributors include Stephen Davies, Daniel B. Klein, Robert C. Arne, Bruce L. Benson, David G. Green, James Tooley, Fred E. Foldvary, Donald J. Boudreaux, Randall G. Holcombe, Robert H. Nelson, Spencer H. MacCallum, and Alexander Tabarrok.  It covers the topics of privatized provision of urban infrastructure, roads, planning, police, charity, medical care, education, and commercial regulation, particularly through examination of historical examples of this provision.

Belmont, Massachusetts: Belmont is a town in Middlesex County, Massachusetts, a western suburb of Boston.  It is part of the greater Boston metropolitan area.  Its population was 26,171 as of 01 2016

Supporting paragraphs: David G. Mugar Belmont, Massachusetts
Answer: Middlesex