<Tr> <Th> Alma mater </Th> <Td> University of Calcutta Aligarh Muslim University </Td> </Tr> <P> Mohammad Hamid Ansari (pronunciation (help info); born 1 April 1937) is an Indian politician who served as the 12th Vice-President of India from 2007 to 2017 . He has also served as an Indian ambassador and is ex-chairman of Rajya Sabha . Ansari was the first person to be re-elected as Indian VP after Sarvepalli Radhakrishnan in 1957 . He served as President of the Indian Institute of Public Administration, Chancellor of Panjab University, Delhi University, Pondicherry University and the President of the Indian Council of World Affairs in his capacity as vice president </P> <P> Ansari worked as an ambassador and served as the Vice-Chancellor of the Aligarh Muslim University from 2000 to 2002 . Later he was Chairman of the National Commission for Minorities from 2006 to 2007 . He was elected as the Vice-President of India on 10 August 2007 and took office on 11 August 2007 . He was reelected on 7 August 2012 and was sworn - in by Pranab Mukherjee, the President of India . The oath taking ceremony was conducted at Rashtrapati Bhavan on 11 August 2012 . His second term ended in August 2017 since he was not offered another term, he decided not to run for a third term in the 2017 vice-presidential election . Upon the inauguration of Ram Nath Kovind as President of India in 2017, Ansari became the first Indian Vice-President to serve during the terms of three presidents . He was the longest serving chairman of Rajya Sabha . </P> <P> Ansari was born on 1 April 1937 at Calcutta, Bengal Presidency (present day Kolkata in the state of West Bengal) to Mohammad Abdul Aziz Ansari and Aasiya Begum . Though his ancestral home is in the city of Ghazipur of the Uttar Pradesh state, he spent his formative years in Kolkata . He is a grand - nephew of former Indian National Congress president and freedom fighter Mukhtar Ahmed Ansari . He is also related to the Uttar Pradeshi politicians Mukhtar Ansari, Afzal Ansari and Sibakatullah Ansari . </P>

Who worked as vice president under three president
find me the text answering this question