query: SELECT avg(Num_of_Factories) FROM manufacturer WHERE num_of_shops  >  20
question: Find the average number factory manufacturer that have more than 20 shop.
query_toks: SELECT avg ( Num_of_Factories ) FROM manufacturer WHERE num_of_shops > 20
query_toks_no_value: select avg ( num_of_factories ) from manufacturer where num_of_shops > value
question_toks: Find the average number factory manufacturer that have more than 20 shop.