Question: Information:  - Natalia Vladimirovna Linichuk (born 6 February 1956) is a Russian ice dancing coach and former competitive ice dancer for the Soviet Union. With partner Gennadi Karponosov, she is the 1980 Olympic champion and a two-time World champion.   - Natalia Vladimirovna Linichuk ( Russian :     ; born February 6 , 1956 ) is a Russian ice dancing coach and former competitive ice dancer for the Soviet Union . With partner Gennadi Karponosov , she is the 1980 Olympic champion and a two - time World champion .  - Gennadi Mikhailovich Karponosov (born 21 November 1950) is an ice dancing coach and a former competitive ice dancer for the Soviet Union. With Natalia Linichuk, he is the 1980 Olympic champion and a two-time World champion.    Given the information, choose the subject and object entities that have the relation of 'date of birth'.
Answer:
natalia linichuk , 6 february 1956