sentences:  After the Leader of the Labour Party and incumbent Deputy Prime Minister Anne Vondeling unexpectedly announced he was stepping down as Leader the Labour Party leadership approached Den Uyl as a candidate to succeed him, Den Uyl accepted and became the Leader of the Labour Party and "Lijsttrekker" (top candidate) of the Labour Party for the election of 1967 on 13 September 1966.The Cabinet Cals fell shortly thereafter on 14 October 1966 and continued to serve in a demissionary capacity until it was replaced by the caretaker Cabinet Zijlstra on 22 November 1966.After the election of 1967 the Labour Party suffered a small loss, losing 6 seats but retained its place as the second largest party and now had 37 seats in the House of Representatives.