user: What is a graph in graph theory?

assistant: In graph theory, a graph is a structure amounting to a set of objects in which some pairs of the objects are in some sense "related".

user: Extract interconnection technologies used to create a regular working system.

assistant: Interconnection technologies such as circuit boards, electronics packaging technology, and other varied forms of communication infrastructure complete circuit functionality and transform the mixed components into a regular working system.

user: Why do humans like dogs?

assistant: Dogs are very popular pets. People like dogs for different reasons, but dogs are known to be very loyal. They also can help provide protection to the owner. There are also dogs with special skills, such as helper dogs that can help guide a person with an eye impairment. Despite their popularity, not everyone enjoys the company of dogs. Some people are allergic to most dogs.