If there are at least 10 grey wool sheep in a group foresting on grass.
return sheep ;return wool of #1 ;return #1 where  #2 is grey ;return #3 in  a  group ;return grass ;return #4 foresting on #5 ;return the  number of  #6 ;return if  #7 is at least 10
['select', 'project', 'comparative', 'filter', 'select', 'filter', 'aggregate', 'boolean']