Teacher:Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Teacher: Now, understand the problem? Solve this instance: Context : Mustangs at Las Colinas is a bronze sculpture by Robert Glen, that decorates Williams Square in Las Colinas in Irving, Texas.
Answer : bronze
Student:
What is the surface of Mustangs at Las Colinas made of?