SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function avg (alias eventcnt) (children 1)
     ExpressionList (children 1)
      Identifier eventcnt
    Identifier d1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tp
   ExpressionList (children 1)
    Identifier d1
