Give me a list of cities whose temperature in Mar is lower than that in Dec and which have never been host cities.
return cities ;return #1 that  have been host cities ;return #1 besides #2 ;return temperatures of #3 ;return #4 in Mar ;return #4 in Dec ;return #3 where #5 is  lower than #6
['select', 'filter', 'discard', 'project', 'filter', 'filter', 'comparative']