Teacher: In this task, you will be presented with a question and you have to answer the question based on your knowledge. Your answers should be as short as possible.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Who were the builders of the mosque in Herat with fire temples ?
Solution: Ghurids
Reason: This is a good example. Ghurids were the builders of the mosque in Herat with fire temples.

Now, solve this instance: What is the Effluence of the tributary whose Confluence was completed in 1966 ?
Student:
Bush Ait