90608
Walter Bobbie made frequent appearances , as early as 1989 , and continuing through 2006 – 2007 .
 Walter Bobbie
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:
 Walter Bobbie