Example sentences of "[am/are] [vb pp] about by [noun] " in BNC.

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1 I sometimes feel that a great many of our social problems at the moment , young people rampaging , are brought about by mothers going out to work …
2 These vowel changes are brought about by rules — not the sort of rules that one might teach to language learners , but more like the instructions that one might build into a machine or write into a computer program .
3 A large proportion of important innovations are brought about by people who step outside of conventional categories or traditional assumptions .
4 Two of the things we do know about communication and representation within the brain are , first , that they are brought about by nerve cells , and , second , that the neocortex is the most interesting bit of the brain to consider since it is the part whose great expansion distinguishes the primates from other mammals , and makes humankind pre-eminent among primates .
5 All the permissions granted by the GDO are subject to conditions and some are hedged about by preconditions which can be very important .
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