What key details about ivan apostolov -lrb- pentathlete -rrb- can be extracted from the following bio? Bio: ivan apostolov -lrb- born 20 december 1941 -rrb- is a bulgarian modern pentathlete . he competed at the 1968 summer olympics .
A:
- sport is modern pentathlon- birth date is 20 december 1941- name is ivan apostolov- birth place is sofia , bulgaria