represent contestant age height hometown
represent
contestant
age
height
hometown
number
first second first_number second_number
text text number unitnum(unitnum) text
alta verapaz casetie lily dubois caravantes 23 1.74 m (5 ft 8 1⁄2 in) copan
how many delegates are at most 20 years old ?
WRB JJ NNS VBD-AUX IN JJS CD NNS JJ .
4
Keyword Keyword Keyword Column Keyword Keyword Keyword Keyword Column Keyword Literal.Number
select count ( c2 ) from w where c3_number <= 20
Keyword Keyword Column None Keyword Keyword Literal Column Column None
['agg', 'agg_count'] ['agg', 'agg_count'] c2 ['comp', 'comp_lequal'] ['comp', 'comp_lequal'] c3_number c3_number