Which product did the Song pay less of, bolts of silk or ounces of silver?
return the  Song ;return products #1 did pay ;return #2 that are bolts of   silk ;return #2 that are ounces of   silver ;return number of  #3 ;return number of  #4 ;return which is lowest of   #5 ,  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'comparison']