Question: The 1986 South Antrim by-election included a candidate from which Northern Irish unionist party?
Sentence (from "South Antrim by-election, 1986"): The 1986 South Antrim by-election was one of the fifteen 1986 Northern Ireland by-elections held on 23 January 1986, to fill vacancies in the Parliament of the United Kingdom caused by the resignation in December 1985 of all sitting Unionist Members of Parliament (MPs).
Relevant evidence: Yes