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The state took over the management of the property in 1950 , but by the 1980 s the visitor facilities were felt to be unsuitable , leading to a three-way partnership being created between the local council , the state agency English Heritage and a local charitable trust to develop the castle .
 organization: English Heritage
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:
 organization: English Heritage