Example sentences of "[coord] [is] think to [be] [adj] " in BNC.

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1 The enzyme progastricsin , is present in 30–40% of gastric adenocarcinomas and is thought to be useful in differentiating between colonic and gastric adenocarcinomas .
2 This has been generally well received and is thought to be helpful and informative on matters of chambers administration .
3 This trophy , whose origin is unknown but is thought to be contemporary with the arrow , was presented by the Society of Gentlemen Archers of Darlington in 1830 .
4 The reason for this is not known but is thought to be due to infection by the virus itself .
5 The etiology is unknown , but is thought to be due to the dissolution and aspiration of dead or dying worm material into the alveoli .
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