The Client and PropertyRentalOwner relations are both in 1NF as there is a single value at the intersection of each row and column. The Client relation contains data describing clients and the PropertyRentalOwner relation contains data describing property rented by clients and property owners. However, as we see from Figure 13.13, this relation also contains some redundancy and as a result may suffer from similar update anomalies to those described in Section 13.3.