Example sentences of "which have [been] [v-ing] since [num] " in BNC.

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1 CEPALC is a non-profit-making organisation which has been working since 1978 to serve the communication needs of grassroots groups in the towns and rural areas of Colombia .
2 Such a strategy underpinned the demonstration project which had been running since 1977 in Eindhoven and Rijswijk .
3 EC Education Ministers agreed on Dec. 14 , 1989 , at a meeting in Brussels to extend the Erasmus programme of inter-university exchanges , which had been running since 1988 , for a further five years from 1990 to 1994 .
4 A close alignment with Egypt was established , confirming a relationship which had been improving since 1989 .
5 It was decided in 1985 that the maypole , which had been standing since 1953 , was no longer safe and should be replaced .
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