Example sentences of "[prep] which [verb] [been] [prep] [noun] " in BNC.

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1 The spectrophotometer designed by Dobson in the 1920s was greatly improved ( with the assistance of R. H. Kay ) , so that by the start of the international geophysical year in 1956 there were about fifty instruments in action , almost all of which had been to Shotover to be checked , calibrated , and compared with Dobson 's own instrument .
2 A number of museums wanted the works , some of which had been on loan to The Metropolitan .
3 The House approved cases the authority of which had been in doubt .
4 Iran was reported on Nov. 13 to have permitted foreign residents to return to the island of Abu Musa , possession of which had been in dispute since mid-April when Iranian troops took over civilian installations [ see pp. 38887 ; 39116 ; 39165 ] .
5 Only the skylit fifth floor opens permanently on 19 February with an expanded sampling of the museum 's contemporary collection , much of which has been in storage for years , and with a long-term installation of a promised gift of twenty-seven works by American abstract artist Leon Polk Smith ( b. 1906 ) .
6 It is part of a move to clear a growing backlog of radioactive waste , some of which has been in store for 25 years .
7 It would appear that much of France 's corporate aggrandisement has been undertaken by state-owned companies , many of which have been in receipt of illicit subsidies .
8 Group savings schemes and such like which have been in existence for many years .
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