Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Literal UInt64_1
    Function and (children 1)
     ExpressionList (children 2)
      Function in (children 1)
       ExpressionList (children 2)
        Literal UInt64_1
        Literal Tuple_(UInt64_0, UInt64_2)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal UInt64_2
        Subquery (alias subquery) (children 1)
         SelectWithUnionQuery (children 1)
          ExpressionList (children 1)
           SelectQuery (children 1)
            ExpressionList (children 1)
             Literal UInt64_2