Example sentences of "which have been [adj] for [adj] " in BNC.

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No Sentence
1 Anglo-Saxon archaeology has n't come to a crisis point as did prehistoric studies in the early 1960s ; rather it is gradually slipping into new directions with the establishment of a generation of archaeologists more aware that alternative approaches exist to be tried and which have been available for 20 years .
2 There are 5,733 empty council houses , almost 2,000 of which have been empty for more than a year .
3 To be sure of having bulbs in flower at Christmas , it is advisable to buy specially prepared ones which have been temperature-treated for early flowering .
4 All too often , we are called to see foals which have been ill for 24 hours or more and by that stage they can be very sick indeed .
5 The research project will investigate these evolving patterns in a life course context to describe the experiences of different groups over time , and to attempt to explain the factors which have been responsible for these changes .
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