Question: Jure Leskovec is the chief scientist of the site founded by whom?

Context paragraphs:
Ronald Kaplan: Ronald M. Kaplan (born 1946) is a Vice President at Amazon.com and Chief Scientist for Amazon Search (A9.com).  He was previously Vice President and Distinguished Scientist at Nuance Communications and director of Nuance' Natural Language and Artificial Intelligence Laboratory.  Prior to that he served as Chief Scientist and a Principal Researcher at the Powerset division of Microsoft Bing.  He is also an Adjunct Professor in the Linguistics Department at Stanford University and a Principal of Stanford's Center for the Study of Language and Information (CSLI).  He was previously a Research Fellow at the Palo Alto Research Center (formerly the Xerox Palo Alto Research Center), where he was the manager of research in Natural Language Theory and Technology.

Jure Leskovec: Jure Leskovec is an associate professor of Computer Science at Stanford University focusing on networks.  He is the chief scientist at Pinterest.

Pinterest: Pinterest is a web and mobile application startup that operates a software system designed to discover information on the World Wide Web, mainly utilizing images and on a shorter scale, GIFs and videos.  The site was founded by Ben Silbermann, Paul Sciarra and Evan Sharp.

Amit Garg: Dr Amit Garg is an Indian mathematician and mental calculator working as Chief Scientist in Bengaluru, India.  He is founder and Chief Scientist of ORMAE, a small scale company focusing on developing cutting edge algorithms for Operations Research, Machine learning and Analytics.  his favourite student IS PRIYANSHU studying in allen.

Greg Zacharias: Dr. Greg Zacharias is the current Chief Scientist of the United States Air Force.  The position of the Chief Scientist was created over 60 years ago to provide independent scientific advice to the Secretary of the Air Force and the Chief of Staff of the Air Force, as well as to its senior leadership.  In this role, he works with the top scientists and engineers within the Air Force as well as in academia, industry, and the other armed services to ensure that the Air Force's research and development efforts remain relevant and effective.  Additionally, as the Chief Scientist he responds to any tasking from the Secretary of the Air Force and the Air Force Chief of Staff on issues or opportunities of a scientific and technical nature that may arise.  He also interacts with other services and the Office of the Secretary of Defense on issues affecting the Air Force in-house technical enterprise.  He serves on the Executive Committee of the Air Force Scientific Advisory Board.  He is the principal science and technology representative of the Air Force to the civilian scientific and engineering community and to the public at large.

Avi Hasson: Avi Hasson (Hebrew: אבי חסון) is the incumbent Chief Scientist of the Ministry of Economy (formerly Ministry of Industry, Trade and Labor) of the State of Israel.  Avi Hasson has been named Israel's new Chief Scientist, taking over for the retiring Dr. Eli Ophir at the beginning of 2011.

Richard L. Abrams: Richard L. Abrams (born April 20, 1941 in Cleveland, Ohio) was president of the Optical Society of America in 1990.  Abrams holds both a bachelor's degree and a Ph.D. from Cornell University.  He worked at Bell Labs from 1968-1971 and then worked at Hughes.  At Hughes, Abrams was chief scientist, Defense Systems Division, Hughes' Space and Communications Group, and was responsible for applying technology to the communication spacecraft.  Abrams retired as chief scientist of Hughes Research Laboratories in 1996.  Currently, Abrams is continuing his career as a part-time consultant, primarily for the U.S. government.

Mica Endsley: Dr. Mica Endsley is an engineer and a former Chief Scientist of the United States Air Force.  The position of the Chief Scientist was created over 60 years ago to provide independent scientific advice to the Secretary of the Air Force and the Chief of Staff of the Air Force, as well as to its senior leadership.  In this role, she worked with the top scientists and engineers within the Air Force as well as in academia, industry, and the other armed services to ensure that the Air Force's research and development efforts remain relevant and effective.  Additionally, as the Chief Scientist she responded to any tasking from the Secretary of the Air Force and the Air Force Chief of Staff on issues or opportunities of a scientific and technical nature that may arise.  Dr. Endsley was the first human factors engineer and the first female to serve as Chief Scientist.

Mark J. Lewis: Dr. Mark J. Lewis was the Chief Scientist of the U.S. Air Force, Washington, D.C. from 2004 to 2008 and was the longest-serving Chief Scientist in Air Force history.  He served as chief scientific adviser to the Chief of Staff and Secretary of the Air Force, and provided assessments on a wide range of scientific and technical issues affecting the Air Force mission.  In this role he identified and analyzed technical issues and brought them to attention of Air Force leaders, and interacted with other Air Staff principals, operational commanders, combatant commands, acquisition, and science & technology communities to address cross-organizational technical issues and solutions.  His primary areas of focus included energy, sustainment, long-range strike technologies, advanced propulsion systems, and workforce development.

NASA Chief Scientist: The Chief Scientist is the most senior science position at the National Aeronautics and Space Administration (NASA).  The Chief Scientist serves as the principal advisor to the NASA Administrator in science issues and as interface to the national and international science community, ensuring that NASA research programs are widely regarded as scientifically and technologically well founded and are appropriate for their intended applications.

Supporting paragraphs: Jure Leskovec Pinterest
Answer: Ben Silbermann, Paul Sciarra and Evan Sharp