Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Input: Statement: Prehistoric cultures flourished first in the north and in today's Alentejo region of south-central Portugal. Choices: 1. Today's Alentejo region of south-central Portugal and the north is where the prehistoric cultures flourished. 2. North is one of the regions where prehistoric cultures failed to grow. 3. Prehistoric cultures flourished in many territories of today's countries, not only Portugal.

3