Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Identifier t1.value
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (alias t1) (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 3)
           ExpressionList (children 1)
            Function transform (alias value) (children 1)
             ExpressionList (children 4)
              Identifier number
              Literal Array_[UInt64_2, UInt64_4, UInt64_6]
              Literal Array_[\'google\', \'censor.net\', \'yahoo\']
              Literal \'other\'
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              TableIdentifier system.numbers
           Literal UInt64_10
