81.   A big problem that many people have building complicated spreadsheets, they realized, was organizing the data.

82.   A big problem with incentives is that they often cause loyal consumers to buy sooner than they otherwise might, so that sales in future months are penalized.

83.   A big problem, according to Leinoff, is the presence in St. Louis of Southwest Airlines, a low-cost competitor.

84.   A big problem, some here say, is that The Handshake and the euphoria surrounding it were overblown by the politicians as a new dawn.

85.   A big problem.

86.   A brick could not travel so fast without creating truly big problems for physics, not to mention humanity as a whole.

87.   A big problem coach Bill Fitch had with Barry last season was committing silly turnovers and doing a bad Magic Johnson impression with misplaced no-look passes.

88.   A big problem has been figuring out what causes the virus.

89.   A big problem quickly emerged, however.

90.   A big problem quickly emerged.