year competition venue position notes
year
competition
venue
position
notes
number
address
first second first_number
number
number text address rank(text) unitnum
1999 european junior championships riga, latvia 15th (q) 49.65 m
how many world championships has he been in ?
WRB JJ NN NNS VBD-AUX PRP VBD-AUX IN .
3
select count ( * ) from w where c2 = 'world championships'