user: What were all the earlier names for the city presently known as Chennai?

assistant: Chennai traces its roots back to a fishing village called Madrasapattinam. The British officially named it Madras when they purchased the land in the 17th century. The name of the city was changed to Chennai in 1996.

user: What are the best sports movies?

assistant: The Rocky movies are quite popular, especially the original Rocky.  42, Facing the Giants, The Natural, Moneyball, Friday Night Lights, Remember the Titans, Hoosiers, Rudy, Tin Cup, The Blind Side, etc are also worthy of recognition.  Many movie fans would also consider movies like Caddyshack, even though that's more of a Comedy, yet evolves around a golf match.

user: Given this text about gradient descent, what is gradient descent, and who invented it?

assistant: In mathematics,  gradient descent (also often called steepest descent) is a first-order iterative optimization algorithm for finding a local minimum of a differentiable function. Gradient descent is generally attributed to Augustin-Louis Cauchy, who first suggested it in 1847