51.   A problem had occurred with the equipment on Monday and ScottishPower had been asked by Strathclyde Regional Council to help.

52.   Almost the same thing occurs with fruit trees.

53.   Although great white attacks in Northern California seem few and far between, they occur with some regularity compared to other parts of the world.

54.   Although the laboratory was secured by locks, he said, mysterious accidents occurred with the Ciena test equipment.

55.   And if any of these problems occurs with a swirled finish, usually with ceilings, or a popcorn ceiling, forget it.

56.   And while the House must elect a speaker every two years, the only competitive races occur with a political sea change.

57.   Another freeze-thaw problem that can occur with either a poured concrete or slate-slab sidewalk has to do with so-called heaving of the slabs.

58.   Anxiety disorders and substance abuse often occur along with these disorders.

59.   As so often occurs with major legislation, there was internal intrigue to match what was public.