question: Find the id for the trips that lasted at least as long as the average duration of trips in zip code 94103.
#1 return trips 
#2 return #1 in  zip code 94103 
#3 return duration of #2 
#4 return average of #3 
#5 return duration of #1 
#6 return #1 where #5 is at least #4 
#7 return id of #6