Question: Alexander Campbell, was a tavern owner, who, with three other convicted, was hanged for the murders of two mine operatives, which  Irish 19th-century secret society active in Ireland, Liverpool and parts of the eastern United States, best known for their activism among Irish-American and Irish immigrant coal miners in Pennsylvania?
{'answer': 'Molly Maguires', 'supporting_facts': [['Alexander Campbell (suspected Molly Maguire)', 0], ['Molly Maguires', 0]]}