Task: Question Answering
Input (English): passage: Three-way and four-way switches make it possible to control a light from multiple locations, such as the top and bottom of a stairway, either end of a long hallway, or multiple doorways into a large room. These switches appear externally similar to single pole, single throw (SPST) switches, but have extra connections which allow a circuit to be controlled from multiple locations. Toggling the switch disconnects one ``traveler'' terminal and connects the other.
 question: is there such thing as a 4 way switch?
Output (English): Yes