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On November 15 , 2012 , it was announced that Katherine Heigl , Will Arnett and Brendan Fraser had joined the cast of the film , and on March 1 , 2013 , it was announced that Liam Neeson has also joined .
 person: Katherine Heigl; person: Will Arnett; person: Brendan Fraser; person: Liam Neeson
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Katherine Heigl, Will Arnett, Brendan Fraser, Liam Neeson 
Answer:
 person: Katherine Heigl; person: Will Arnett; person: Brendan Fraser; person: Liam Neeson