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Plot BIRTH STORY : INA MAY GASKIN AND THE FARM MIDWIVES tells the story of counterculture heroine Ina May Gaskin and her spirited friends , who began delivering each others babies in 1970 , on a caravan of hippie school buses , headed to a patch of rural Tennessee land .
 Ina, Gaskin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ina, Gaskin