Question: On which day is the spokesman of Cambridge Who's who born ?

full_context: Document 1: Wynton Hall: Wynton Hall is Breitbart News managing editor and Social Media Director. He is also the owner of Wynton Hall & Co, a celebrity ghostwriting and communications agency, and a Government Accountability Institute communication strategist. He has ghostwritten several New York Times bestsellers, including Donald Trump's book "Time to Get Tough".
Document 2: Ivanka Trump: Ivanka Trump ( born Ivana Marie Trump; October 30, 1981) is an American television personality, fashion designer, author and businesswoman who is an advisor to the President of the United States, Donald Trump. She is the daughter of the president and his first wife, former model Ivana Trump.
Document 3: Eric Trump: Eric Frederick Trump (born January 6, 1984) is an American businessman, philanthropist, and former reality TV personality. He is the third child and second son of the President of the United States, Donald Trump, and Ivana Trump. Alongside his older brother Donald Trump Jr., he serves as a trustee of The Trump Organization.
Document 4: Business career of Donald Trump: Donald Trump is an American businessman, former television personality, and the 45th President of the United States. He began his real estate career at his father's company, Elizabeth Trump and Son, which he later renamed to The Trump Organization. He rose to public prominence after a number of successful real estate deals in Manhattan and New York City, and his company now owns and develops lodging and golf courses around the world. Trump partly or completely owned several beauty pageants between 1996 and 2015. He has marketed his name to many building projects and commercial products. Trump's unsuccessful business ventures have included several casino and hotel bankruptcies, the folding of his New Jersey Generals football team, and the now-defunct Trump University.
Document 5: Cambridge Who's Who: Cambridge Who's Who is a vanity publisher which describes itself as highlighting people's professional careers by publishing encapsulated biographies. For additional payment, the publisher also provides other promotional services such as press releases, videos, and Executive of the Year awards. The company is located in Uniondale, New York. As of 2010, Donald Trump Jr. was spokesman and “executive director of global branding” of the company. As of November 2016 the business was "not accredited" by the Better Business Bureau of Metropolitan New York, Long Island, and the Mid-Hudson Region.
Document 6: The New York Enterprise Report: The New York Enterprise Report or "' NY Report"' is a media company based in New York City, New York. The company is founded on the belief that all business owners should have access to the expertise that will help them grow their companies. The business caters to entrepreneurs and executives who constantly seek better ways to operate and grow. Through NY Report’s multi-media platforms, they provide their readers with access to knowledge from experts and inspiration from successful entrepreneurs.The publication mainly covers local small businesses, that are located within the Greater New York Area. The magazine uses expert-written news articles, tips, advice and other helpful resources to help small business owners expand their company. The New York Enterprise Report puts out a monthly publication as well as publishes daily articles and interviews on their website to help people grow their businesses.
Document 7: Ivana Trump: Ivana Marie Trump (née Zelníčková , ] ; February 20, 1949) is a Czech-American businesswoman and former fashion model. She was the first wife of Donald Trump from 1977 until 1992.
Document 8: Donald Trump: Donald John Trump (born June 14, 1946) is the 45th and current President of the United States, in office since January 20, 2017. Before entering politics, he was a businessman and television personality.
Document 9: Donald Trump pseudonyms: American businessman, politician, and 45th President of the United States, Donald Trump, has used several pseudonyms, including "John Barron" (or "John Baron") and "John Miller". His habit of sometimes speaking to the media under the guise of a spokesperson has been described as "an open secret" at the Trump Organization and in New York media circles. Some New York editors recalled that "calls from Barron were at points so common that they became a recurring joke on the city desk." A writer for "Fortune" reported that Trump's father Fred Trump had used a pseudonym ("Mr. Green") in business dealings.
Document 10: David J. Pecker: David J. Pecker is the Chairman and CEO of American Media (publisher). He is the publisher of "National Enquirer", "Star", "Sun", "Weekly World News", "Globe", "Men's Fitness", "Muscle and Fitness", "Flex", "Fit Pregnancy" and "Shape". He has served in his current role at AMI since 1999 and previously served as Chairman and CEO of Hachette Filipacchi Médias. He began his career as an accountant and, at CBS Magazines, rose to vice president and controller. As the junior of four employees in a partnership, CBS Magazines was acquired in a leveraged buyout and sold to Hachette. He soon after became CEO at Hachette when the other three partners resigned.
Document 11: Forbes: Forbes ( ) is an American business magazine. Published bi-weekly, it features original articles on finance, industry, investing, and marketing topics. "Forbes" also reports on related subjects such as technology, communications, science, politics, and law. Its headquarters is located in Jersey City, New Jersey. Primary competitors in the national business magazine category include "Fortune" and "Bloomberg Businessweek". The magazine is well known for its lists and rankings, including its lists of the richest Americans (the Forbes 400) and rankings of world's top companies (the Forbes Global 2000). Another well-known list by the magazine is The World's Billionaires list.
Document 12: Fred Trump: Frederick Christ Trump Sr. (October 11, 1905 – June 25, 1999) was an American real estate developer and philanthropist, primarily in New York City, and father of Donald Trump, the 45th President of the United States, and Maryanne Trump Barry, a United States Court of Appeals judge.
Document 13: News Is My Business: News Is My Business is an online newspaper covering business topics related to Puerto Rico. The newspaper was founded by Michelle Kantrow, a journalist with over 18 years of experience and recipient of an Overseas Press Club award. The newspaper is listed by the Puerto Rico Government Development Bank as an "english language source of news on Puerto Rico" and is often cited as a news source by several organizations including the Puerto Rico Products Association, Connect Puerto Rico, Voxxi, Metro International, "El Nuevo Día", and the Puerto Rico Center for the New Economy.
Document 14: Valley Yellow Pages: Valley Yellow Pages is owned by AGI Publishing, Inc., and is an independent Yellow Pages directory publisher serving 45 markets in Northern and Central California. An independent Yellow Pages publisher is a company that publishes Yellow Pages directories as alternatives to the local phone companies. The independent directories include similar headings and advertisements, and are distributed to local households and businesses in the market areas. Advertisements are sold to local businesses as an alternative choice to the traditional phone companies. This helps to keep local market Yellow Pages advertising costs down.
Document 15: Donald Trump Jr.: Donald John Trump Jr. (born December 31, 1977) is an American businessman and former reality TV personality. He is the oldest child of the 45th President of the United States, Donald Trump, and his first wife, Ivana.
ground_truth: December 31, 1977