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It was later announced along with the commission of a seventh series that Harriet Walter and Freema Agyeman would depart off-screen , thus this was the final season to feature them as part of the regular cast .
 person: Harriet Walter; person: Freema Agyeman
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: Harriet Walter, Freema Agyeman 
Answer:
 person: Harriet Walter; person: Freema Agyeman