What is the definition of “semi-autobiographical”?

pertaining to or being a fictionalized account of an author's own life. pertaining to or being a work of fiction strongly influenced by events in an author's life.

Semi-autobiographal

(of a written work) dealing partly with the writer's own life but also containing fictional elements.

themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.

to gain popularity at school, fitzgerald wrote plays for the school and cast himself as the star. he also joined one of the universitys most prestigious clubs.