In this task, you will be given a set of steps that are required to answer a specific question. Your job is to generate that question. Each given step refers to either an entity (known or unknown), a propery of an entity or a query operation (count, group, union, etc.) Knowing those operations and how they appear in the input may help you generate more accurate questions.
 Select: A select step is used to return a set of objects. There are no references to previous steps in a select step. template: Return [attributes]
 Filter: A filter step is used to return results from a previous step to which a certain condition applies. template: Return [#step] [condition]
 Project: A project step should return certain attributes of the results of a previous step. template: Return [attributes] of [#step]
 Aggregate: An aggregate step returns an aggregator function applied on a step's result. template: Return the [aggregator] of [#step].
 Group: A group step is an aggregator applied on attributes. template: Return the [aggregator] of [#step] for each [attribute]
 Superlative: A superlative step is used to return the result with a highest/lowest attribute among other results. template: Return [#step1] [where] [#step2] [is] [highest / lowest]
 Comparative: A comparative step is used when we need to compare an attribute with a number to filter results. template: Return [#step1] [where] [#step2] [comparator] [number] 
 Union: A union step is used to return results of two steps together. template: Return [#step1] [or / ,] [#step2]
 Intersection: An intersection step returns the result that two steps have in common. template: Return [attribute] of both [#step1] and [#step2]
 Discard: A discard step returns result of a step and excludes result of another step from it. template: Return [#step1] besides [#step2]
 Sort: A sort returns result of another step in a specific order. template: Return [#step1] [ordered / sorted by] [#step2]
 Is true: An is true step checks a condition on another result and returns a true or false. template: Return [is / if] [condition]
 Arithmetic: An arithmatic step operates an arithmatic operation on one or more steps. template: Return the [arithmetic op.] of [#step1] [and] [#step2].

[EX Q]: #1 return customers 
#2 return orders of  #1 
#3 return number of  #2 for each  #1 
#4 return #1 where #3 is  highest 
#5 return name of  #4 
#6 return phone number of  #4 
#7 return email address of  #4 
#8 return #5 ,  #6 ,   #7
[EX A]: What are the name, phone number and email address of the customer who made the largest number of orders?

[EX Q]: #1 return staircase 
#2 return railings of #1 
#3 return #1 where  #2 is horizontal 
#4 return number of  #3 
#5 return if  #4 is at least one
[EX A]: If there is at least one staircase with horizontal railings.

[EX Q]: #1 return flights 
#2 return #1 that  are nonstop 
#3 return #2 between nashvilles 
#4 return #3 and   st. louis 
#5 return #4 that  arrive after noon and   before 8pm
[EX A]:
what flights are there between nashville and st. louis which are nonstop and arrive after noon and before 8pm