Question: Who was the first president of the United States whose estate is maintained by Mount Vernon Ladies' Association?

Context articles: Mount Vernon High School (Ohio)
George Washington's Gristmill
The Washington Papers
Rosemont Plantation
Mount Vernon Ladies' Association
Ellen Call Long
George Washington
Ann Pamela Cunningham
Mount Vernon, Washington
Mottahedeh &amp; Company

Mount Vernon High School is a public four-year high school located in Mount Vernon, Ohio, United States.
 It is the only high school in the Mount Vernon City Schools district.
 The school's mascot is the Yellow Jacket, and its official colors are orange and black.
 The mascot is actually orange and black rather than yellow and black, due to copyright reasons.
 It is located at 300 Martinsburg Road, near State Route 586.
 Near the high school is Mount Vernon Middle School, the only one in the district.
 Also nearby is Mount Vernon Nazarene University, MVNU.
George Washington’s Gristmill was part of the original Mount Vernon plantation, constructed during the lifetime of the United States' first president.
 The original structure was destroyed about 1850.
 The Commonwealth of Virginia and the Mount Vernon Ladies’ Association have reconstructed the gristmill and the adjacent distillery.
 The reconstructed buildings are located at their original site three miles (5 km) west of Mount Vernon proper near Woodlawn Plantation in Alexandria, Virginia.
 Because the reconstructed buildings embody the distinctive characteristics of late eighteenth century methods of production and are of importance to the history of Virginia, the site is listed on the National Register of Historic Places despite the fact that the buildings are not original.
The Washington Papers, also known as The Papers of George Washington"," is a project dedicated to the publication of comprehensive letterpress and digital editions of George and Martha Washington’s papers.
 Founded at the University of Virginia in 1968 as the Papers of George Washington, the Washington Papers is an expansive project that includes the papers and documents of George Washington as well as of individuals close to him.
 The Washington Papers aims to place Washington in a larger context and to bring individuals, such as Martha Washington and Washington family members, into sharper focus.
 The project is currently headed by editor-in-chief and director Edward G. Lengel and is the largest collection of its type.
 The project is funded in part by the National Endowment for the Humanities, the National Historical Publications and Records Commission, the Packard Humanities Institute, the Mount Vernon Ladies' Association, the University of Virginia, the Florence Gould Foundation, and other private donors.
Rosemont Plantation is a historic archaeological site located near Waterloo, Laurens County, South Carolina.
 Development of the plantation was begun sometime between 1750 and 1790, and reached its zenith during the second quarter of the 19th century.
 The main house burned in 1930.
 Architectural remains may provide information on intra-site patterning, subsistence data, refuse disposal patterns, architecture and organization of the plantation, and the display of wealth by the plantation owner.
 It was the home of Ann Pamela Cunningham, who worked to save George Washington’s Mount Vernon Plantation and served as the first Regent of the Mount Vernon Ladies' Association of the Union.
The Mount Vernon Ladies' Association is a non-profit organization that preserves and maintains the Mount Vernon estate originally owned by George Washington.
Ellen Call Long (1825-1905) was the daughter of Florida territorial governor Richard Keith Call and a member of the influential Call-Walker political family of Florida.
 The longtime proprietor of The Grove, which she acquired from her father in 1851 and held until 1903, Ellen Call Long received distinction after the Civil War through her efforts in historic preservation, history, memorialization, forestry, silkworm cultivation, and the promotion of Florida.
 She was the author of Florida Breezes, a semi-fictional account of antebellum life primarily set in Middle Florida which is widely regarded as one of the best primary source accounts of the planter class lifestyle in Florida.
 She was the founder of the Florida chapters of the Mount Vernon Ladies Association and the Ladies Hermitage Association.
 She was also named a Florida delegate to several important expositions, including the Centennial International Exhibition in Philadelphia (1876), the World’s Columbian Exposition in Chicago (1893), and the Exposition Universelle in Paris, France (1889).
 She was the founder of the Ladies Memorial Association of Tallahassee, a group that is now known as the Anna Jackson Chapter of the United Daughters of the Confederacy.
 Her published report made before the American Forestry Congress in 1888 titled “Notes of Some of the Forest Features of Florida,” is considered a seminal work in the field of fire ecology.
 She was also a tireless promoter of silk culture in Florida, representing the Ladies Silk Culture Association of Philadelphia and emerging as a local expert in cultivation.
George Washington (February 22, 1732 [O.S. February 11, 1731]  – December 14 , 1799) was an American politician and soldier who served as the first President of the United States from 1789 to 1797 and was one of the Founding Fathers of the United States.
 He served as Commander-in-Chief of the Continental Army during the American Revolutionary War, and later presided over the 1787 convention that drafted the United States Constitution.
 He is popularly considered the driving force behind the nation's establishment and came to be known as the "father of the country," both during his lifetime and to this day.
Ann Pamela Cunningham (August 15, 1816 Rosemont Plantation, South Carolina - May 1, 1875) is credited with saving George Washington's beloved home Mount Vernon from ruin and neglect.
 In a letter to Ann Pamela, Cunningham's mother described the crumbling condition of the estate as she saw it in 1853 while on a steamship heading down the Potomac River.
 Cunningham was in her 30s and, having been crippled in a riding accident as a teenager, decided she would initiate a campaign to save the estate.
 She raised funds to purchase Mount Vernon by launching an unprecedented appeal for donations through newspaper articles directed toward "the Ladies of the South" and founded The Mount Vernon Ladies' Association of the Union, the group that still owns and manages Washington's estate, and served as its first regent.
 The group purchased Mount Vernon for $200,000 The Mount Vernon Ladies' Association is the oldest private preservation organization in the United States.
Mount Vernon is the county seat of Skagit County, Washington, United States.
 The population was 31,743 at the 2010 census.
 It is one of two principal cities of and included in the Mount Vernon-Anacortes, Washington Metropolitan Statistical Area.
 It is the county seat of Skagit County.
 Downtown Mount Vernon is known for its annual Tulip Festival Street Fair, which is part of the Skagit Valley Tulip Festival.
 The climate of Skagit County is similar to that of Northern France, with millions of tulips grown in the Skagit Valley.
 In 1998, Mount Vernon was rated the #1 "Best Small City in America" by the "New Rating Guide to Life in America's Small Cities".
Mottahedeh & Company is a company in New York City that makes tableware and decorative accessories.
 The company has made porcelain for the President of the United States, the U.S. State Department and the Diplomatic Corps.
 The company, over 85 years old, was purchased from the Mottahedeh estate in 1992 by Wendy and Grant Kvalheim with a minor partnership with Jeffrey and Pamela Mondschein.
 Mildred Mottahedeh continued to collaborate at Mottahedeh for five more years and died in February, 2000.
 Today Wendy Kvalheim is the CEO and Design Director of the company.
 Mottahedeh is the recognized leader in antique reproductions and adaptations in luxury ceramics, primarily hard porcelain, and metals.
 It specializes in Chinese Export porcelain and early European porcelain.
 It holds licenses with Metropolitan Museum of Art, Colonial Williamsburg Foundation, Historic Charleston Foundation, Mount Vernon Ladies Association, Winterthur Museum and Gardens, and Tony Duquette, and has a history of working with many more.
 The most recent license is with National Geographic Society.