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From 1801-1810 he attended Lawrence Academy , graduated in 1814 from Harvard , taught for one year at the Phillips Exeter Academy , and returned to study at the Harvard Divinity School ( class of 1817 ) , after which he served for twenty years as the Unitarian minister of Harvard Church in Charlestown , Massachusetts .
 Lawrence Academy, Harvard, Phillips Exeter Academy, Harvard Divinity School, Harvard, Charlestown , Massachusetts
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lawrence Academy, Harvard, Phillips Exeter Academy, Harvard Divinity School, Harvard, Charlestown , Massachusetts