21.   Saudi-Iranian relations were later to deteriorate following the disturbances caused by Iranian pilgrims at Mecca.

22.   Whereas relationships express the association between two entities, relations are a tabular representation of an entity, complete with attributes.

23.   Everyone has used tables, and relations are tables.

24.   Relations are transformable into other models, such as hierarchies or networks, which are other ways in which database management systems can view data structures.

25.   This is achieved if the relations are in first normal form and all non-key attributes are fully functionally dependent on all the key.

26.   This relation is all key, and there is nothing incorrect in this.

27.   The relations are now in second normal form.

28.   Kin relations are a particularly good example.

29.   The development of gap junctions in the human gastric mucosa has been examined to see if there is any relation to gastric ulcer.

30.   There was no relation between the disease activity of ulcerative colitis and the presence of anti-neutrophil antibody or the level of anti-neutrophil antibody titre.