If some keyboards have white/gray keys.
return keyboards ;return keys of #1 ;return #1 where  #2 are white/gray ;return number of  #1 ;return number of  #3 ;return difference of #4 and #5 ;return if  #5 is at least one ;return if  #6 is at least one ;return if  both  #7 and #8 are true
['select', 'project', 'comparative', 'aggregate', 'aggregate', 'arithmetic', 'boolean', 'boolean', 'boolean']