Example sentences of "[prep] [Wh det] [am/are] known to be " in BNC.
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| 1 | The names and dates of birth of all parents of case and control children ( regardless of whether or not they were interviewed ) were cross checked against three databases of employees held by the nuclear industry , the completeness and accuracy of which are known to be high . |
| 2 | In Part I women talk about so-called conventional therapies which include years of swallowing powerful hormonal and fertility drugs , like Perganol and Clomid , both of which are known to be dangerous . |
| 3 | On these features are imposed several other psychological symptoms , many of which are known to be common to semistarvation , irrespective of its cause . |
| 4 | However , there are marked variations in biomass of Colohus spp. in Africa and Presbytis spp. in Asia in different forests and these can not be explained in terms of the overall degree of herbivory of an individual species or its body size , both of which are known to be correlated with biomass in primates as a whole . |
| 5 | During the breakdown of these types of bleach , many different kinds of organo-chlorine substances can be produced , some of which are known to be highly toxic and carcinogenic . |