8648
He gave the first performance of his friend Gustav Holst 's " The Planets " , and introduced new works by , among others , Elgar , Bliss , Britten , Delius , Rootham , Tippett , Vaughan Williams and Walton .
 person: Gustav Holst; media: The Planets; person: Elgar; person: Bliss; person: Britten; person: Delius; person: Rootham; person: Tippett; person: Vaughan Williams; person: Walton
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Gustav Holst; media: The Planets; person: Elgar; person: Bliss; person: Britten; person: Delius; person: Rootham; person: Tippett; person: Vaughan Williams; person: Walton