rank heat athlete nationality time notes
rank
heat
athlete
nationality
time
notes
number
number
number
list length
number number text text number <c,text>
1 1 natalya ivanova russia 23.11 q
how many athletes are from russia ?
WRB JJ NNS VBD-AUX IN NNP .
2
select count ( c3 ) from w where c4 = 'russia'