Question: The death of which sitting member of the party formed in 1874 by Isaac Butt lead to the Dublin St Stephen's Green by-election, 1888?
{'answer': 'Edmund Dwyer Gray', 'supporting_facts': [["Dublin St Stephen's Green by-election, 1888", 0], ["Dublin St Stephen's Green by-election, 1888", 1], ['Irish Parliamentary Party', 0]]}