Please answer the following question: What key details about marian heffernan can be extracted from the following bio? Bio: marian heffernan -lrb- born 16 april 1982 in cork , ireland -rrb- is an irish athlete who competed at the in the women 's 4 400 metres relay at the 2012 summer olympics . heffernan is fifth in the all-time irish record books for the women 's 400 metres.she is married to ireland 's renowned olympic race walker rob heffernan .
A:
- sport is athletics- event is 4 400m relay- height is 1.71- birth date is 16 april 1982- weight is kg 63