68148
The opening theme tune , closing theme tune , and incidental music were written and performed by Howard Goodall , with the vocals on the closing theme tune by Jenna Russell .
 Howard Goodall, Jenna Russell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Howard Goodall, Jenna Russell