How many products have the color description 'red' and the characteristic name 'slow'?
return products ;return color descriptions of  #1 ;return #1 where  #2 is  'red ;return characteristic names of  #1 ;return #1 where  #4 is  'slow ;return #3 and #5 ;return number of #6
['select', 'project', 'comparative', 'project', 'comparative', 'union', 'aggregate']