Table:
text: 1978 New Zealand rugby union tour of Britain and Ireland
Matches
Matches
Opposing_Team Against Date_ Venue Status_
Cambridge University 12 18 October 1978 Grange Road, Cambridge Tour Match
Cardiff 7 21 October 1978 Cardiff Arms Park , Cardiff Tour Match
West Wales XV 7 25 October 1978 St Helen`s , Swansea Tour Match
London Counties 12 28 October 1978 Twickenham , London Tour Match
Munster 12 31 October 1978 Thomond Park , Limerick Tour Match
IRELAND 6 4 November 1978 Lansdowne Road , Dublin Test Match
Ulster 7 7 November 1978 Ravenhill , Belfast Tour Match
WALES 12 11 November 1978 Cardiff Arms Park , Cardiff Test Match

text: 1978 New Zealand rugby union tour of Britain and Ireland
Matches
Matches
Opposing_Team Against Date_ Venue Status_
South and South-West Counties 0 15 November 1978 Memorial Ground , Bristol Tour Match
Midland Counties 15 18 November 1978 Welford Road , Leicester Tour Match
Combined Services 6 21 November 1978 Aldershot Military Stadium , Aldershot Tour Match
ENGLAND 6 25 November 1978 Twickenham , London Test Match
Monmouthshire 9 29 November 1978 Rodney Parade , Newport Tour Match
North of England 6 2 December 1978 Birkenhead Park, Birkenhead Tour Match
North and Midland of Scotland 3 5 December 1978 Linksfield Stadium, Aberdeen Tour Match
SCOTLAND 9 9 December 1978 Murrayfield , Edinburgh Test Match
Bridgend 6 13 December 1978 Brewery Field , Bridgend Tour Match
Barbarians 16 16 December 1978 Cardiff Arms Park , Cardiff Tour Match

Question: Which is the lowest opponent to have tour match status and a venue of Ravenhill, Belfast among the 1978 New Zealand Rugby Union tours of Great Britain and Ireland?