41.   But his showcase projects, bailouts of automakers AZLK and ZiL, have cost the city dearly while failing to yield definitive results.

42.   But it yields impressive results.

43.   But lawyers for McGinn, who says he is innocent, say advances in DNA testing could now yield conclusive results if the evidence were retested.

44.   But in a move that would yield rich results, he settled in America to teach at the Boston School for Deaf-Mutes.

45.   But local efforts seem to have yielded mixed results.

46.   But most of the earlier studies have been criticized for flaws like being too brief or including too few patients to yield meaningful results.

47.   But there has been no sign that the overture has yielded positive results.

48.   But these negotiations have yielded few results, and many Colombians believe the rebels have simply used the time to rearm and strengthen their forces.

49.   But those drugs have yielded uncertain results.

50.   But those efforts have failed to yield tangible results so far, the officials said.