Question:  NextGen America was created by a philanthropist born in what year?

Context paragraphs:
Chappie Fox: Charles Philip "Chappie" Fox (May 27, 1913 – September 12, 2003) was a circus historian and philanthropist born in Milwaukee, Wisconsin, who greatly expanded the Circus World Museum and helped found the Great Circus Parade in Milwaukee.

Gisela Oeri: Gisela "Gigi" Oeri is a Swiss-German football chairwoman and philanthropist born 8 November 1955 in Schopfheim, Baden-Württemberg, Germany.  She was the chairwoman of FC Basel from 2006 until 2012.

Robert Wilson Reford, Sr.: Robert Wilson Reford (3 August 1831 – 15 March 1913) was a businessman and philanthropist born in County Antrim (Northern Ireland).  Reford emigrated to Canada and became one of the most successful businessmen of his generation.  Perhaps best known for his shipping interests, he amassed a fortune based on a variety of business pursuits from Montreal.

NextGen America: NextGen America is an environmental advocacy nonprofit and political action committee created in 2013 by Tom Steyer supporting candidates and policies that take action against climate change.  It has typically criticized Republican candidates, but has also targeted Democrats who have failed to take a stance on climate change.  The organization has also been an opponent of the Keystone XL pipeline.

Armand Heine: Armand Heine (1818 – 9 November 1883) was a Jewish banker and philanthropist born in Bordeaux, France, who later lived in his chateau and vineyard, Beychevelle in Bordeaux.  With his brother Michel he founded the famous bank Armand & Michael Heine, in cooperation with Rothschild Frères & Co. in Paris, France and New Orleans, Louisiana, United States.  Armand was married to Marie-Amélie Kohn, daughter of a famous, very rich Jewish who was born in Bohemia.

Eleanor Silliman Belknap Humphrey: Eleanor Silliman Belknap Humphrey (1876–1964) was an American artist, genealogist, writer, socialite, and philanthropist born in Louisville, Kentucky.  She was the daughter of William Richardson Belknap, president of Louisville's Belknap Hardware and Manufacturing Company, and his first wife Alice Trumbull Silliman.

Tom Steyer: Thomas Fahr Steyer (born June 27, 1957) is an American hedge fund manager, philanthropist, environmentalist, liberal activist, and fundraiser.

Carnegie College: Carnegie College (formerly Lauder College) was a further education college based in Halbeath, Dunfermline, Fife, Scotland.  It was established in 1899, with financial support from George Lauder.  In 2007, it was renamed Carnegie College in honour of Andrew Carnegie, the steel magnate and philanthropist born in Dunfermline.

Paul Johnson (philanthropist): Paul Jolliffe Johnson, ONL (1929- October 12, 2015) businessman and philanthropist born St. John's, Newfoundland, son of Marjorie (Jolliffe) and Arthur Johnson.  Educated Prince of Wales College; King's College School, Windsor, Nova Scotia; Mount Allison Academy; Mount Allison University.

Cher Wang: Cher Wang (; ) is a Taiwanese entrepreneur and philanthropist born in Taipei, Taiwan.  As co-founder and chairperson (since 2007) of HTC Corporation (which manufactured one out of every six smartphones sold in the United States) and integrated chipset maker VIA Technologies.  She is considered one of the most powerful and successful women in technology.  Wang's father was Wang Yung-ching, founder of the plastics and petrochemicals conglomerate Formosa Plastics Group and one of the wealthiest individuals in Taiwan before his death in 2008.  As of 2014, she is listed as the 54th most powerful woman in the world by "Forbes".

Supporting paragraphs: NextGen America Tom Steyer
Answer: 1957