query: SELECT avg(age) ,  max(age) ,  sex FROM student GROUP BY sex
question: What that average and most old age each gender student?
query_toks: SELECT avg ( age ) , max ( age ) , sex FROM student GROUP BY sex
query_toks_no_value: select avg ( age ) , max ( age ) , sex from student group by sex
question_toks: What that average and most old age each gender student?