query: SELECT product_category_code FROM products WHERE product_name  =  "flax"
question: Which category do the product named "flax" belong to?
query_toks: SELECT product_category_code FROM products WHERE product_name = `` flax ''
query_toks_no_value: select product_category_code from products where product_name = value
question_toks: Which category do the product named "flax" belong to?