Text: On the night of 14 December 1702, despite many obstacles, they attacked Kira's heavily guarded villa on the east side of the Sumida River, cut off his head, and brought it in triumph to Asano's tomb at Sengakuji, the family temple.
Entailment: Kira's head was carried to Asano's tomb at Sengakuji.
Contradiction: Kira's heavily guarded villa was attacked on the 12th of July.