query: SELECT count(*) ,  rank FROM captain WHERE age  <  50 GROUP BY rank
question: How many captain with more younger than 50 in each rank?
query_toks: SELECT count ( * ) , rank FROM captain WHERE age < 50 GROUP BY rank
query_toks_no_value: select count ( * ) , rank from captain where age < value group by rank
question_toks: How many captain with more younger than 50 in each rank?