Find the number of the products that have their color described as "red" and have a characteristic named "slow".
return products ;return colors of #1 ;return characteristics of #1 ;return #1 where #2 is  red ;return #1 where #3 is  slow ;return number of  both #4 and #5
['select', 'project', 'project', 'comparative', 'comparative', 'intersection']