Complex sentence: Reïna-Flor Okori, the only Equatoguinean female competitor at Rio at age 36, had previously competed at the previous three Summer Games but with the French Olympic team.
Split into simpler sentences: Reïna-Flor Okori, at age 36, was the only Equatoguinean female competitor. She had previously competed at the previous three Summer Games but with the French Olympic team.