Example sentences of "be [verb] to have been caused by " in BNC.

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1 That the windscreen wipers started to work can properly be said to have been caused by a set of things including the state of the wipers ' mountings and the smooth surface of the windscreen as well as the switch 's being flipped .
2 At first the explosions were thought to have been caused by a gas leak , but gradually the police were able to piece together evidence linking the disaster to the Weathermen , one of whom had attached a wire to the wrong terminal .
3 The problems of all five aircraft were thought to have been caused by fuel with a low octane level .
4 Similar pores have been observed also in the Z1 Carbonate of the Auk ( Brennand and van Veen 1975 ) and Claymore fields and in outcrops of Zechstein carbonates in the U.K. , where leaching is thought to have been caused by meteoric water during uplift and exposure ( Clark 1980a ) .
5 The erosion is believed to have been caused by a combination of : i ) the relative rise in sea level brought about by the slow sinking of southeastern England ; ii ) an actual rise in sea level locally since the 1970s ; and iii ) the reduction of saltmarshes due to human-made sea defences .
6 The fire was reported to have been caused by a wiring short circuit .
7 The fire was reported to have been caused by a wiring short circuit .
8 Fergie 's ill temper was thought to have been caused by an argument on the telephone with Texan pal Johnny Bryan .
9 It was believed to have been caused by high levels of SO2 or NO2 pollution from East Germany or Poland .
10 The unrest , which was connected with further proposed petrol price and bus fare increases and also involved student protests , was believed to have been caused by a Supreme Court decision not to proceed with corruption charges against various former ministers .
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