Table:
athlete
event
heat
quarterfinal
semifinal
final

result
rank
result
rank
result
rank
result
rank

djikoloum mobele
100 m
dns
did not advance

kaltouma nadjina
400 m
51.50
3 q
n/a
51.57
5
did not advance

Statement: kaltouma nadjina's 2004 summer olympics time was of 51.50 seconds in the heat.
Question: what was the result that kaltouma nadjina got in the heat?
Answer: [51.5]