sentences:  Den Uyl became a Member of the House of Representatives after the election of 1956 when the number of seats in the House of Representatives was raised from 100 to 150 seats, taking office on 6 November 1956.In May 1963 Den Uyl was appointed as an Alderman in Amsterdam, he resigned as a Member of the House of Representatives the day he was installed as an Alderman, taking office on 5 June 1963.On 27 February 1965 the Cabinet Marijnen fell and continued to serve in a demissionary capacity until the cabinet formation of 1965 when it was replaced by Cabinet Cals with Den Uyl appointed as Minister of Economic Affairs, taking office on 14 April 1965.