rank swimmer country time note
rank
swimmer
country
time
note
number
number min sec
number text text time text
1 claudia poll costa rica 1:00.45 q
how many swimmers did not swim ?
WRB JJ NNS VBD-AUX RB VB .
4
Keyword Keyword Keyword Column Keyword Keyword Keyword Keyword Column Keyword Keyword
select count ( c2 ) from w where c1 is null
Keyword Keyword Column Column Column Column None
['agg', 'agg_count'] ['agg', 'agg_count'] c2 c1 c1 c1