Example sentences of "which [verb] [been] know [prep] " in BNC.

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1 It was made explicit by the inclusion in those Conventions of the famous provision in the Preamble which has been known as the Martens clause .
2 Of course the most famous object in Andromeda is the Great Spiral , M31 , which has been known from very early times .
3 Thus the Hellenistic age saw an intellectual event of the first order : the confrontation of the Greeks with four other civilizations , three of which had been practically unknown to them before , and one of which had been known under very different conditions .
4 He pursued the antimicrobial properties of soil organisms , particularly actinomycetes , which had been known since the 1920s to produce inhibitory substances .
5 Glasgow University 's recently published study of homelessness among the young in Scotland simply highlights the facts which have been known to anyone who had been working in the social security system in whatever capacity for a number of years .
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