Table:
text: Stena Line Holland BV
Ships operated by Zeeland Steamship Company (SMZ)
Ships operated by Zeeland Steamship Company (SMZ)
Ships_name Date_entered_service Date_withdrawn Tonnage Type_of_Ship
Oranje Nassau 27 August 1945 July 1954 3053 Twin Screw Steamer
Mecklenburg 21 November 1945 25 October 1959 2907 Twin Screw Steamer
Koningin Emma 5 March 1948 December 1968 4353 Twin Screw Motorship
Prinses Beatrix 31 May 1948 September 1968 4353 Twin Screw Motorship
Koningin Wilhelmina 7 February 1960 1 July 1978 6228 Twin Screw Motorship
Koningin Juliana 17 October 1968 8 April 1984 6682 Twin Screw Ro-Ro Motorship
Prinses Beatrix 29 June 1978 May 1986 9356 Twin Screw Ro-Ro Motorship
Prins Oberon 11 February 1983 11 March 1983 7993 Twin Screw Ro-Ro Motorship

Question: When was the ship named koningin wilhelmina put into service among the Stena Line Holland BV ships operated by the Zeeland Steamship Company (SMZ)?

Question: What are all the service dates recorded on 21 November 1945 for the Stena Line Holland BV vessels operated by the Zeeland Steamship Company (SMZ)?