Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: The exact cause remains unknown, but all the palaces were destroyed at the same time. Choices:  1. All of the palaces were demolished at the same time, but no one is certain of the cause. 2. Some suspect it was a highly organized and timed attack on all the palaces. 3. The cause of the palace destruction is well known to everyone. 

3