6880
A problem that arose during production of the movie was the advanced age and poor health of many of the voice actors from the series ; all of the major cast members except Don Messick ( himself in his early 60 s ) were over 65 years old by this point .
 person: Don Messick
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: Don Messick