Text: (Incidentally, half of the 1992 donations failed, when first disclosed to the FEC, to reveal that the source was a student.)
Entailment: Incidentally, when first disclosed to the FEC, to reveal that the source was a student, halfo f the 1992 donations failed.
Contradiction: None of the 1992 donations failed, since it has been revelaed that the source was a philantrhopist millionaire.