Task: Question Answering
Input (English): Question: What would happen to the size of the valley created by a tributary stream if the size of the stream were to be decreased? 
 Option1: the valley would be shallower 
 Option2: the valley would be deeper 
 Explanation: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.
Output (English): the valley would be shallower