Given the question: Information: - The term adult comics typically denotes comic books, comic magazines, comic strips or graphic novels with content of an erotic, violent, or sophisticated nature, which appeals to adult readers. They are sometimes restricted to purchase by legal adults, especially when they include sexually explicit material. - Necron is the title character of an Italian humorous - horror adult comics miniseries published between 1981 and 1985 . - A graphic novel is a book made up of comics content. Although the word "novel" normally refers to long fictional works, the term "graphic novel" is applied broadly and includes fiction, non-fiction, and anthologized work. It is distinguished from the term "comic book", which is used for comics periodicals. Given the information, choose the subject and object entities that have the relation of 'instance of'.
The answer is:
necron , comic book