sentences:  Piet de Jong
  
  Petrus Jozef Sietse "Piet" de Jong (; 3 April 1915 – 27 July 2016) was a Dutch politician of the defunct Catholic People's Party (KVP) now merged into the Christian Democratic Appeal (CDA) party and naval officer who served as Prime Minister of the Netherlands from 5 April 1967 to 6 July 1971.De Jong applied at the Royal Naval College in Den Helder in June 1931 as an Midshipman before graduating as an Ensign in the Royal Netherlands Navy in July 1934 and joined the Royal Netherlands Navy Submarine Service.