user: Which of the following are convex functions: x^2, x square, 0, sin(x), e^x, sqrt(x), x^-0.5

assistant: x^2, x square, 0, e^x

user: Is Nnedi Okorafor an American?

assistant: Yes, Nnedi Okorafor is an America, of Nigerian origin.

user: Is Boston a good city to visit in the summer?

assistant: Yes, Boston is a great city to visit in the summer. The weather tends to be warm, and there are many historical attractions in the city including the Freedom Trail and Faneuil Hall, as well as museums like the Museum of Science, Museum of Fine Arts, and Isabella Stewart Gardner Museum. You can walk around Boston Common and the Public Garden, or along the waterfront in the Seaport District and the North End. You can kayak in the Charles River, and take in a baseball game at Fenway Park. There are many fine dining restaurants, and something for everyone to enjoy.