query: SELECT avg(num_of_ticket) ,  max(num_of_ticket) FROM visit
question: What-what the average and maximum number of ticket bought in all visit?
query_toks: SELECT avg ( num_of_ticket ) , max ( num_of_ticket ) FROM visit
query_toks_no_value: select avg ( num_of_ticket ) , max ( num_of_ticket ) from visit
question_toks: What-what the average and maximum number of ticket bought in all visit?