Table: oranje_nassau
Columns: ships_name
date_entered_service
date_withdrawn
tonnage
type_of_ship

Question:  what's the date entered service with ships name koningin wilhelmina
SQL: SELECT "date_entered_service" FROM oranje_nassau WHERE "ships_name" = 'Koningin Wilhelmina'

Question:  what's the date where ships name is zeeland entered service
SQL: SELECT "date_entered_service" FROM oranje_nassau WHERE "ships_name" = 'Zeeland'

Question: what is the maximum tonnage where date entered service is 25 march 1986 
SQL: SELECT MAX("tonnage") FROM oranje_nassau WHERE "date_entered_service" = '25 March 1986'

Question: what are all the date withdrawn for service entered on 21 november 1945
SQL: SELECT "date_withdrawn" FROM oranje_nassau WHERE "date_entered_service" = '21 November 1945'

Question: what are all the date withdrawn for twin screw ro-ro motorship
SQL: SELECT "date_withdrawn" FROM oranje_nassau WHERE "type_of_ship" = 'Twin Screw Ro-Ro Motorship'

Question: what are all the date withdrawn for koningin beatrix
SQL: SELECT "date_withdrawn" FROM oranje_nassau WHERE "ships_name" = 'Koningin Beatrix'