81.   But considerable doubt exists on just how big a threat the exhaust is.

82.   But even in a united Germany the left-of-center majority that Willy Brandt talked of exists only on paper.

83.   But he is crippled by a passive part without a personality, and the emotional journey Homer takes exists largely on the surface alone.

84.   But no data exist on whether teen smoking in the state has declined since the campaign was begun.

85.   But right and wrong exist on one plane, and good and evil on another.

86.   But the make-or-break contest for the president is shaping up in the Senate, where no majority exists on any tax plan.

87.   But the problem still existed on the plane that crashed.

88.   But the creepy thing is that ad only exists on TV through special technology.

89.   But to lawyers and record labels, a band is something that exists on paper, a business relationship with owners, employees and sometimes even shareholders.

90.   But they could not exist on the slim wages.