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In this latter field , R. D. Laing , Thomas Szasz and Michel Foucault were instrumental in moving medicine away from emphasis on " cures " and towards concepts of individuals in balance with their society , both of which are changing , and against which no benchmarks or finished " cures " were very likely to be measurable .
 person: R. D. Laing; person: Thomas Szasz; person: Michel Foucault
Please list all entity words in the text that fit the category.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} 
Answer:
 person: R. D. Laing; person: Thomas Szasz; person: Michel Foucault