sentences:  Zijlstra continued to comment on political affairs as a statesman until his death from a dementia at the age of 83.Jelle Zijlstra was born on 27 August 1918 in Oosterbierum in the province of Friesland in a Reformed family, the son of Ane Jelle Zijlstra (born 14 November 1879) and Pietje Postuma (born 6 March 1897), both of which had also been born in the village.After completing his secondary education he studied at the Netherlands School of Economics, the predecessor of the Erasmus University Rotterdam.