i have 2 tables owner(Name,ID int) Property(PID int,Name(fk) references Owner). List Owners who have one property

SQL> SELECT
  2  Owner_First-name,Owner_Last-name,Owner-ID
  3  FROM Owner
  4  INNER JOIN(SELECT
  5  Owner-ID, COUNT(*) AS Count Of
  6  FROM Property
  7  HAVING COUNT(*)>1
  8  )Ow ON Owner.Owner_First-name AND `Owner.OwnerID`=Property.OwnerID
  9  );
)Ow ON Owner.Owner_Firstname AND Owner.OwnerID=Property.OwnerID
                         *

ERROR at line 8:

ORA-00920: invalid relational operator