81.   Efforts to teach sign language and other symbolic systems to chimps met with some success, but researchers have vehemently disagreed over the significance of the results.

82.   Eric and Annie disagree over work and school issues.

83.   Economists disagree over how to make such estimates.

84.   Even so, there is still lots to disagree over.

85.   Edwards and the board disagreed over the length of the contract.

86.   Even the United States and Russia still disagree over those details.

87.   Everyone agreed that states should have more money to build prisons, but they disagreed over how stringent the requirements should be for the states to get the money.

88.   Experts have disagreed over whether the corroding hulk poses a health risk, with some Russians arguing that the danger is high.

89.   Finally, the Atlanta Committee for the Olympic Games and the Postal Service have disagreed over service at the Olympic Village.

90.   Experts disagree over whether the two sides should plan to spend the windfall at all until it actually materializes.