If a manmade shelter for people is in the background behind a sled dog team moving rightward.
return shelter ;return #1 that is manmade ;return #2 that is for people ;return sled dog team ;return #4 that is moving rightward ;return #3 that is behind #5 ;return number of  #6 ;return if  #7 is at least one
['select', 'filter', 'filter', 'select', 'filter', 'filter', 'aggregate', 'boolean']