51.   Coast guard officials reported two loud offshore blasts Wednesday and began an investigation to pinpoint the cause.

52.   Doctors at OHSU removed planned to send her heart and lungs to a specialist to pinpoint the cause of death.

53.   Doctors planned to send her heart and lungs to a specialist to pinpoint the cause of death.

54.   Government scientists have been unable to pinpoint the causes so far.

55.   He declined to pinpoint the cause of the fire until an investigation was completed and insurance company reports submitted.

56.   He said many studies into the illnesses have been conducted and none has definitively pinpointed a cause.

57.   Investigators were trying to pinpoint the cause of the fire, which some thought might have been caused by a burning cigarette butt.

58.   Japanese Prime Minister Ryutaro Hashimoto urged ministers at an emergency meeting to do all they can to pinpoint the cause.

59.   Magnetic resonance imaging tests have failed to pinpoint the cause of the pain.

60.   Montali worked with other veterinarians and physicians to pinpoint a cause, eventually identifying a virus similar to the one that causes hepatitis.