Olga Bondareva, whose professional field was Economics and Mathematics, died on December 9, 1991. Olga Bondareva, an economist that was a known professional in the field of mathematics, died on December 9, 1991. Olga Bondareva, who worked in the fields of economics and mathematics, died on December 9th, 1991.
<Subject> Olga_Bondareva <Predicate> professionalField <Object> Mathematics
