346149
He also served on the Council and Executive of the National Trust for Scotland until 1961 and on the Board of the Scottish Special Housing Association from 1954 to 1961 , and was Acting Secretary of the Royal Scottish Academy from 1954 to 1955 .
 National Trust for Scotland, Scottish, Royal Scottish Academy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 National Trust for Scotland, Scottish, Royal Scottish Academy