user: How many series did Dance Mums air?

assistant: Two seasons, it was not commissioned for a third series.

user: Where should I go for vacation?

assistant: Where you should go for vacation depends on your interests and budget. For example, if you want to immerse yourself in nature, you could visit a local national park and stay in a nearby town. You could spend your time hiking, picnicking, and sightseeing in the national park in a cost effective way. If you prefer nightlife, visiting a city may be for you. In the United States, some options are Los Angeles and New York City. Finally, if you prefer spending your time in museums, find a vacation spot with a rich history, and enjoy immersing yourself in the local culture. For example, India, Peru and Paris are three destinations with and endless supply of local history and culture.

user: Explain the use of screens in basketball

assistant: In basketball, when a team has the ball, one person may set a screen by blocking a defender with his body but making sure his hands are not extended. This allows the person with the ball to pass, shoot, etc. without issuing any fouls. If the person setting a screen moves while screening, the referee will call a moving screen and the ball will be inbounded by the person who moved while screening from the half court line. In any case, screens do not foul the screener for contact unless they are to do physical contact with their hands or feet.