SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier p.begin
    Identifier e.begin
    Identifier e.value
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier probe0 (alias p)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier events0 (alias e)
     TableJoin (children 1)
      Function less (children 1)
       ExpressionList (children 2)
        Identifier p.begin
        Identifier e.begin
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier p.begin
