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?
Sentence (from "County Carlow by-election, 1886"): The County Carlow by-election, 1886 was a parliamentary by-election held for the United Kingdom House of Commons constituency of County Carlow on 29 January 1886.
Relevant evidence: No