sentences:  During his term as Prime Minister of the Netherlands De Jong met with numeral state leaders, including then President Richard Nixon, Presidents of France Charles de Gaulle and Georges Pompidou.He was present in the hospital when Prince Claus announced the birth of his son Willem-Alexander, Prince of Orange on 27 April 1967.After serving as Prime Minister of the Netherlands De Jong became a member of the Senate, where he served from 1971 to 1974 and as the Parliamentary leader in the Senate.