Example sentences of "[adj] are know to be [adj] " in BNC.

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1 It 's it 's on the basis that any employer has a duty of care to employees and what I mean by that is that er an employer has a responsibility to not work employers er er employees under conditions that that are known to be unsafe .
2 After ballots of parents , 215 schools have so far opted out : but another 2,000 are known to be keen to do so , given that grant-maintained status offers them money and freedom .
3 Although realistic estimates of the capital costs to the university for radical restructuring are not available , these are known to be substantial ( perhaps £200m immediately ) , and the implications of all the Tomlinson proposals to the wellbeing of Londoners , to the university , and to the practice of medicine in London must be viewed with great concern .
4 No porosity or permeability data has been published for the oolitic grainstones but these are known to be porous in the southern North Sea and Poland where they display both primary inter-granular and leached intragranular pores ( Taylor and Colter 1975 ; Peryt and Piatkowski 1977 ; Peryt 1978 ) .
5 Most are known to be false .
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