SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 3)
      Literal \'simpleLinearRegression\'
      Literal Array_[UInt64_1, UInt64_2, UInt64_3, UInt64_4]
      Literal Array_[UInt64_1000000000, UInt64_1100000000, UInt64_1200000000, UInt64_1300000000]