7600
David Ackroyd was promoted to a regular cast member after multiple guest appearances in the second half of the first season .
 person: David Ackroyd
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: David Ackroyd