Cyrus Massoumi
Cyrus Massoumi is the founder of the investment fund humbition.
He is also the founder of Zocdoc and was the company CEO for eight years.
John De Margheriti
John De Margheriti( born July 1962) is an Italian- born Australian electrical engineer, software developer and entrepreneur.
De Margheriti is widely seen as a founding' father' of Australia's video games industry and Australia's most experienced interactive entertainment business executive.
He is the founder and former CEO of BigWorld Pty Limited and the founder of parent company Micro Forté Pty Limited.
De Margheriti is also the Executive Chairman of the Academy of Interactive Entertainment, the Chairman of Canberra Technology Park, the founder of the Game Developers' Association of Australia, the founder of the Australian Game Developers Conference, and the founder of the three Canberra business parks, the co-founder of DEMS Entertainment, the co-founder of Dreamgate Studios, the co-founder of Game Plus and co-founder of The Film Distillery De Margheriti has been recognised as an Honorary Ambassador for Canberra due to his contribution to Australia's national capital.
Roc Nation Sports
Roc Nation Sports is the sports management division of Roc Nation.
Roc Nation Sports was founded by Shawn "JAY-Z" Carter in Spring 2013 in partnership with Creative Artists Agency, a prominent talent agency based in Los Angeles.
Sue Fennessy
Sue Fennessy( born 25 July 1968) is an Australian- born American entrepreneur.
She is the founder and CEO of WeAre8, the founder of the Standard Media Index( SMI), the founder of Frontiers Group LTD, and a fellow at Monash University.
Kareem Burke
Kareem" Biggs" Burke( born January 19, 1974) is an American entrepreneur, record executive and film producer.
Burke is best known as co-founder of Roc- A- Fella Records along with Shawn" Jay- Z" Carter and Damon" Dame" Dash.
Tsuruichi Hayashi
He was the founder of the" Tohoku Mathematical Journal".
Kyle Thousand
Kyle Jason Thousand( born October 2, 1980 in Sioux City, Iowa) is a sports agent and the head of the baseball division at Roc Nation Sports.
Roc Nation Sports, a division of Roc Nation, was launched by Jay Z in the spring of 2013 with his long- time business partner Juan Perez.
Roc Nation Sports is an exclusive sports agency that is home to the some of the world's best athletes in baseball, football, basketball and boxing.
Sky Dayton
Sky Dylan Dayton( born August 8, 1971) is an American entrepreneur and investor.
He is the founder of Internet service provider EarthLink, co-founder of eCompanies, and the founder of Boingo.
Chaka Pilgrim
Chaka Pilgrim is a music industry executive who is most well known as the President of Roc Nation Records.
Roc Nation consists of both management and label clients, many of whom Ms. Pilgrim has helped from the beginning of their careers.
Some of the notable artists she has worked with include Big Sean, Rihanna, Kanye West, J. Cole, Jay Electronica, Meek Mill, and JAY Z. Besides being a veteran music executive, Pilgrim has also been a key player in TV and film.
Early in career, she also served as producer for many well- known classic African- American movies, such as Streets is Watching, State Property and Paid in Full.
In the past Pilgrim has held positions at Roc- A- Fella Records, Island Def Jam, Atlantic Records, and Virgin Records.
She also serves as an independent marketing consultant at her company, Chakaworks.
Pilgrim currently serves as the Head of Film and Television for Shawn Carter Enterprises.
Jay-Z
Shawn Corey Carter (born December 4, 1969), known professionally as Jay-Z (stylized as JAY-Z), is an American rapper, songwriter, producer, entrepreneur, and record executive.
He is regarded as one of the greatest rappers of all time.
Born and raised in New York City, Jay-Z first began his musical career after founding the record label Roc-A-Fella Records in 1995, and subsequently released his debut studio album "Reasonable Doubt" in 1996.
The album was released to widespread critical success, and solidified his standing in the music industry.
He has gone on to release twelve additional albums, which have all attained generally positive critical reception and commercial success, including "The Blueprint" (2001) and "The Black Album" (2003).
Jay-Z has also released the full-length collaborative albums
"Watch the Throne" (2011) and "Everything Is Love" (2018) with Kanye West and wife Beyoncé, respectively.
Outside of his musical career, Jay-Z has also attained significant success and media attention for his career as a businessman.
In 1999, he founded the clothing retailer Rocawear, and in 2003, he founded the luxury sports bar chain 40/40 Club.
Both businesses have grown to become multi-million dollar corporations, and allowed Jay-Z to fund the start-up for the entertainment company Roc Nation, which was founded in 2008.
In 2015, he acquired the tech company Aspiro, and took charge of their media streaming service Tidal, which has since become the world's third-largest online streaming company.
Jay-Z is one of the world's best-selling music artists, with over 100 million records sold worldwide.
He has won a total of 22 Grammy Awards, the most by a rapper, and holds the record for the most number-one albums by a solo artist on the "Billboard" 200, with 14.
He has been ranked by "Billboard" and fellow music publication "Rolling Stone" as one of the 100 Greatest Artists of All Time.
In 2017, he became the first rapper to be honored into the Songwriters Hall of Fame, and in 2018, received the commemorative "Salute to Industry Icons" award at the 60th Grammy Awards.
In June 2019, Jay-Z officially became the first hip hop billionaire, making him the 3rd wealthiest African-American and the wealthiest American musician.

Question: Which country the founder of Roc Nation Sports is from?
Answer: American