year competition venue position notes
year
competition
venue
position
notes
number
address
first second first_number
number
number text address rank(text) unitnum
2003 world youth championships sherbrooke, canada 10th (q) 1.75 m
how many venues are there ?
WRB JJ NNS VBD-AUX EX .
12
select count ( c2 ) from w