What is the profession of both Daniel Greenberger and Anton Zeilinger?
quantum physicist
Title: Daniel Greenberger
Passage: Daniel M. Greenberger (born 1932) is an American quantum physicist.  He has been professor of physics at the City College of New York since 1964.  He is also a fellow of the American Physical Society and—alongside Anton Zeilinger—founded the APS Topical Group on Quantum Information.
Title: Anton Ludvig Alvestad
Passage: Anton Ludvig Alvestad (7 May 1883 – 2 July 1956) was a Norwegian politician and government minister for the Labour Party.  Born in Sula, Alvestad was a baker by profession, and owned his own bakery.  He was also active in the temperance movement.  An active labour politician from an early date, he was among the founding members of the Labour Party of Ålesund.  Between 1920 and 1921 he was the first Labour mayor of the city.
Title: Anton Zeilinger
Passage: Anton Zeilinger (] ; born 20 May 1945) is an Austrian quantum physicist who in 2008 received the Inaugural Isaac Newton Medal of the Institute of Physics (UK) for "his pioneering conceptual and experimental contributions to the foundations of quantum physics, which have become the cornerstone for the rapidly-evolving field of quantum information".  Zeilinger is professor of physics at the University of Vienna and Senior Scientist at the Institute for Quantum Optics and Quantum Information IQOQI at the Austrian Academy of Sciences.  Most of his research concerns the fundamental aspects and applications of quantum entanglement.
Daniel Greenberger Anton Zeilinger