input: Olga_Bondareva | deathDate | 1991-12-09 Olga_Bondareva | professionalField | Economics Olga_Bondareva | professionalField | Mathematics
target: Olga Bondareva, whose professional field was Economics and Mathematics, died on December 9, 1991.
references: 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.