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If unable to provide references, please remove "Nationality" in the right info block and change Citizenship: United States to Citizenship: India (or Republic of India).
As of this writing Prof Sen is is listed in the information block as:
Nationality: Indian
Citizenship: United States
It would be news if he changed his citizenship in his 80's from Indian to US. India does not permit dual citizenship. The most recent reference I could find is a 2013 CV at Harvard, which says he's Indian.