Q:Information:  - The Demon Wars Saga is a series of seven novels written by R.A. Salvatore. The series is set in the world of Corona, principally in the kingdoms of Honce-the-Bear and Behren, and amongst the nomadic To-gai-ru. The Saga is separated into two trilogies bridged by a single book, "Mortalis". The saga has an accompanying roleplaying game, entitled "Demon Wars".  - Earth, otherwise known as the world, is the third planet from the Sun and the only object in the Universe known to harbor life. It is the densest planet in the Solar System and the largest of the four terrestrial planets.  - A fantasy world is a fictional universe created in fiction media, such as literature, film or games. Typical fantasy worlds involve magic or magical abilities, nonexistent technology and sometimes, either an historical or futuristic theme. Some worlds may be a parallel world tenuously connected to Earth via magical portals or items; a fictional Earth set in the remote past or future; or an entirely independent world set in another universe.  - A fictional universe is a self-consistent imaginary setting with events, and often other elements, that differ from the real world. It may also be called an imagined, constructed or fictional realm (or world). Fictional universes may appear in novels, comics, films, television shows, video games and other creative works.  - Corona is the name of the fantasy world in which R.A. Salvatore 's The DemonWars Saga and The Highwayman are set .    Given the information, choose the subject and object entities that have the relation of 'instance of'.
A:
corona  , fictional universe