In this task, you are given a question. You have to answer the question based on your information.

The term "Five Civilized Tribes" derives from the colonial and early federal period in the history of the United States, and it refers to how many Native American nations, one being the Muscogee, also known as the Creek and the Creek Confederacy, are a closely related group of native North American tribes or Indigenous peoples of the Southeastern Woodlands?
five

While Kurt Kren is a film maker, John Grierson is a what?
documentary maker

What is the name of the institute where both M. S. Raghunathan and Homi J. Bhabha were professors?

Tata Institute of Fundamental Research