51.   It was the second most serious accident at the track this season, the first under race conditions.

52.   It was the second serious accident at a Venezuelan jail in two day.

53.   It was almost a year ago that Vance was involved in a serious automobile accident that almost claimed his life.

54.   Lajous expressed concern that unless Pemex crews can get in to maintain the oil wells and pumps there could be a serious accident.

55.   Khalid, however, pleading chronic diabetes and the effects of a serious motor accident and a heart attack, steered clear of the U.S. courts.

56.   Ledford was the second teenage member of her family to be involved in a serious accident in less than a week.

57.   Marv Schmidt was involved in a serious accident in an off-road race in Mexico that paralyzed his right arm and leg and took away his ability to speak.

58.   Nebraska and Iowa State Patrol spokesmen said Sunday afternoon that no fatalities or serious accidents had been reported on interstate or state highways.

59.   Most serious accidents have involved ships without pilots.

60.   New laws now require local planning for what all insist is the unlikely event of a serious accident or explosion that could spread the deadly gases.