SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal \'clickhouse\' (alias s1)
    Literal \'mouse\' (alias s2)
    Function stringJaccardIndex (children 1)
     ExpressionList (children 2)
      Identifier s1
      Identifier s2
