1) Composer 2) Francois couperin 3) Impact crater on Mercury 4) Organist 
[crater] Couperin is a crater on Mercury. It has a diameter of 80 kilometers. Its name was adopted by the International Astronomical Union in 1979. Couperin is named for the French composer François Couperin, who lived from 1688 to 1733. ...
[n] - French composer of music for organ and a member of a family of distinguished organists (1668-1733)
Francois Couperin noun French composer of music for organ and a member of a family of distinguished organists (1668-1733)
1668–1733, French composer.