text: On December 31 , 1981 , PÃ rez de CuÃ llar succeeded Kurt Waldheim as Secretary-General and was re-elected for a second term in October 1986 .
simplified: On December 31 1981 , PÃ rez de CuÃ llar followed Kurt Waldheim as Secretary-General and was re-elected for a second term in October 1986 .