Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Statement: and words spelled wrong not marked as such Choices:  1. We need to fill in the gaps in our system's dictionary. 2. Some words were missed by the spell checker. 3. Each word has been carefully checked for spelling errors.
Student:
3