Table:
text: Irish Sea
Cities and Towns
Cities and Towns
Rank_ City_Town County Region_Province Population Country
15 Dundalk County Louth Leinster 35085 Republic of Ireland
16 Rhyl Denbighshire Clwyd 35000 Wales
17 Bray County Wicklow Leinster 31901 Republic of Ireland
18 Thornton-Cleveleys Lancashire North West 31157 England
19 Colwyn Bay Conwy Clwyd 30265 Wales
20 Carrickfergus County Antrim Ulster 27201 Northern Ireland
21 Fleetwood Lancashire North West 26840 England
22 Douglas N/A Isle of Man 26218 Isle of Man
20 Workington Cumbria North West 25978 England
23 Whitehaven Cumbria North West 25500 England
24 Dún Laoghaire Dún Laoghaire–Rathdown Leinster 23857 Republic of Ireland
25 Llandudno Conwy Clwyd 20090 Wales
26 Larne County Antrim Ulster 18228 Northern Ireland

text: Irish Sea
Cities and Towns
Cities and Towns
Rank_ City_Town County Region_Province Population Country
1 Dublin County Dublin Leinster 505739 Republic of Ireland
2 Liverpool Merseyside North West 447500 England
3 Belfast County Antrim Ulster 276459 Northern Ireland
5 Blackpool Lancashire North West 142900 England
6 Southport Merseyside North West 99456 England
7 Birkenhead Merseyside North West 83729 England
8 Bangor County Down Ulster 76851 Northern Ireland
9 Barrow-in-Furness Cumbria North West 71980 England
10 Wallasey Merseyside North West 58710 England
11 Crosby Merseyside North West 51789 England
12 Morecambe Lancashire North West 45000 England
13 Lytham St Annes Lancashire North West 41330 England
14 Drogheda County Louth Leinster 35190 Republic of Ireland

Question: If 20 is the rank and North West is the Irish Sea region/province, what is the county?