Question: Who is the oldest senator currently serving in congress?
Answer: Dianne Feinstein
Disambiguated annotations:
qaPairs: question: Who is the oldest Senator serving in Congress from January 3, 2015 t0 December 8, 2016?
answer: John Glenn
question: Who is the oldest Senator serving in Congress from July 30, 2013 to January 3, 2015?
answer: Edward Brooke
question: Who is the oldest Senator serving in Congress from October 20, 2009 t0 July 30, 2013?
answer: Harry F. Byrd Jr.