82517
Some families may have a ( conscious or unconscious ) rule that sadness is " not allowed " , but Robin Skynner has suggested that this may cause problems , arguing that with sadness " screened off " , people can become shallow and manic .
 Robin Skynner
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Robin Skynner