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: At the east end of the galleries, two small columns and a circle of green marble mark the spot where the empress sat during services; on the floor of the nave below, a circle of coloured stone to the right of centre is the Opus Alexandrinum, the place where the Byzantine emperors were crowned. Choices:  1. Byzantine emperors ascending the throne were crowned at the Opus Alexandrinum. 2. The Opus Alexandrinum marks the spot where the bishop would stand during church services. 3. The Opus Alexandrinum has been in place for over twelve hundred years.

2