xsd:string A Predicate is said to apply in a particular Domain. The understanding of the relation between Domain and Predicate depends on the nature of the Predicate. When the Predicate is a complete proposition, then a Domain adverbial also functions as a topic restrictor. Sentences with topic restrictors often come in pairs. When the Predicate is a simple predicate, there is no notion of topic restriction on the sentence level. The Normal College is geographically adjacent to the University of North Wales. Geographically, Britain is a group of island off the mainland of Europe. Culturally , it has always been linked to the continent . Socially and demographically the period has been dominated by two factors -- the fall in the size of families and the increase in the expectation of survival to retirement , the effects of which are still far from having exhausted themselves .