List of craters on Mercury

Columns: Crater | Diameter ( km ) | Approval Year | Eponym | Ref
Chaikovskij | 171 | 1976 | Pyotr Ilyich Tchaikovsky , Russian composer | WGPSN | Chao Meng-Fu | 140.73 | 1976 | Zhao Mengfu , Chinese artist | WGPSN | Chekhov | 194 | 1976 | Anton Chekhov , Russian playwright and writer ) | WGPSN | Chesterton | 37.23 | 2012 | Gilbert Keith Chesterton , English author | WGPSN | Chiang K'ui | 41 | 1976 | Jiang Kui , Chinese poet | WGPSN | Chŏng Ch'ŏl | 143 | 1979 | Jeong Cheol , Korean poet | WGPSN

Example questions:
How many pen names did the person use that the 1979 crater with initial C on Mercury was named after ? | When did the person that had the Mercury 's biggest crater with initial C named after them die ? | In what year was the person born that the 1985 crater on Mercury with initial C was named after ? | When was the person born that had Mercury 's crater ( initial C ) with the diameter of 67 named after them ?

Answers:
two | 22 April 1616 | 1839 | 15 October 1923