81.   The exact nature of the theft charges was not known.

82.   The exact nature of what happened to Ronaldo was never made clear.

83.   The exact nature of her injury was unknown.

84.   The exact nature of his illness was never disclosed, but U.S. sources have said he apparently suffered a stroke.

85.   The exact nature of the case was unclear.

86.   The exact nature and rate of global climate change remains contentious.

87.   The exact nature of the ailments was not immediately known.

88.   The exact nature of the assistance was not immediately clear.

89.   The exact nature of the company was not known.

90.   The exact nature of the conflict was not immediately clear, but it appeared linked to local political and ethnic tensions in Dagestan.