Example sentences of "[verb] [been] known for [adj] " in BNC.
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| 31 | Difficulties with the present ‘ grey gate ’ system , in which the starter pulls a lever to raise a 65 yard-long elastic tape , have been known for some years . |
| 32 | Difficulties with the present ‘ grey gate ’ system , in which the starter pulls a lever to raise a 65 yard-long elastic tape , have been known for some years . |
| 33 | It 's been known for some time that dioxins are created when chlorine is used to make paper white , but in many situations it 's been difficult to find substitutes . |