51.   But while President Ernesto Zedillo agreed with President Clinton in May to negotiate such a system, Mexican officials have cautioned that they have serious legal obstacles to overcome.

52.   But, the official cautioned, everything will depend on the contents of the final agreement.

53.   Census officials cautioned that the results were based on a compilation of the mail that the bureau has received back.

54.   CDC officials cautioned that the new data are preliminary and represent a relatively small sampling of gay men who may be more sexually active than their peers.

55.   Church officials are also cautioning the United States to respond with restraint to the recent terrorist attacks.

56.   City Opera officials caution that their planning is in its early stages and that they have not made a decision to go forward.

57.   Clinton administration officials have continually cautioned the Japanese government about letting their surplus get out of hand.

58.   Clinton administration officials have continually cautioned the Japanese government about letting the surplus get out of hand.

59.   Connecticut education officials cautioned against comparing the data, compiled for the first time this year, with statistics for public schools in other states or for the nation.

60.   Department officials cautioned that not all unlicensed carriers are dangerous.