Information: - Stefka Madina ( Bulgarian : ) is a Bulgarian rower . She was a bronze medal with her partner Violeta Ninova in Double sculls at the 1988 Seoul Olympic Games . - Violeta Nikolaeva Ninova (born 19 August 1963) is a Bulgarian rower. Life and career. Ninova won a bronze medal in Double sculls with her partner Stefka Madina at the 1988 Seoul Olympic Games. She was born in Sofia. - Stefka Mikhaylova Madina (born 23 January 1963) is a Bulgarian rower. She was a bronze medal with her partner Violeta Ninova in Double sculls at the 1988 Seoul Olympic Games. Madina was born in Plovdiv. - Sofia (or or ;) ("Sofiya",) is the capital and largest city of Bulgaria. The city has a population of 1.26 million, while 1.68 million people live in its metropolitan area. The city is located at the foot of Vitosha Mountain in the western part of the country, within less than drive from the Serbian border. Its location in the centre of the Balkan peninsula means that it is the midway between the Black Sea and the Adriatic Sea, whereas the Aegean Sea is the closest to it. What is the relationship between 'stefka madina' and '23 january 1963'?
The answer to this question is:
date of birth