user: How is digital switching possible?

assistant: The nonlinear behaviour of active components and their ability to control electron flows makes digital switching possible.

user: Write a short story about Batman, Superman and Spiderman

assistant: Batman, Superman and Spiderman were all out patrolling the streets when they came across a mysterious figure in a long black cape and a mask. They quickly realized it was none other than The Joker. The Joker had been planning a grand scheme to take over the city and they needed to stop him before it was too late. 

Batman quickly devised a plan. He would disguise himself as a clown, while Superman would disguise himself as a giant robot and Spiderman would disguise himself as a spider. The Joker was fooled and was easily captured. The city was saved and the Joker was taken away to prison.

user: Given this reference text about the Catholic University of America, tell me when it was established, where it is located, and who founded it.

assistant: The Catholic University was founded in 1887 by the US Catholic Bishops, and is located in Washington, DC.