If one of the pairs of mittens is gray knit with a vertical braid-like pattern running its length.
return pairs of  mittens ;return #1 that is  gray knit ;return #2 that is  with  a  vertical braid-like pattern running its length ;return number of #3 ;return If #4 is  equal to one
['select', 'filter', 'filter', 'aggregate', 'boolean']