What are the ids of all stations that have a latitude above 37.4 and have never had less than 7 bikes available?
return stations ;return latitude of #1 ;return #1 where #2 is  above 37.4 ;return bikes ;return #4 that  are available ;return number of  #5 for each #1 ;return #1 where #6 is  not less than  7 ;return #1 in both #3 and #7 ;return ids of #8
['select', 'project', 'comparative', 'select', 'filter', 'group', 'comparative', 'intersection', 'project']