Table:
text: 1985–86 FA Cup
Fourth Round Proper
Fourth Round Proper
Tie_no Home_team Score Away_team Date_
1 Southampton 3–0 Wigan Athletic 25 January 1986
2 Reading 1–1 Bury 25 January 1986
Replay Bury 3–0 Reading 28 January 1986
3 Notts County 1–1 Tottenham Hotspur 25 January 1986
Replay Tottenham Hotspur 5–0 Notts County 29 January 1986
4 Aston Villa 1–1 Millwall 25 January 1986
Replay Millwall 1–0 Aston Villa 29 January 1986
5 Sheffield Wednesday 5–0 Orient 25 January 1986
6 Sunderland 0–0 Manchester United 25 January 1986
Replay Manchester United 3–0 Sunderland 29 January 1986
7 Luton Town 4–0 Bristol Rovers 25 January 1986
8 Everton 3–1 Blackburn Rovers 25 January 1986

text: 1985–86 FA Cup
Fourth Round Proper
Fourth Round Proper
Tie_no Home_team Score Away_team Date_
9 Sheffield United 0–1 Derby County 25 January 1986
10 Manchester City 1–1 Watford 25 January 1986
Replay Watford 0–0 Manchester City 3 February 1986
Replay Manchester City 1–3 Watford 6 February 1986
11 West Ham United 0–0 Ipswich Town 25 January 1986
Replay Ipswich Town 1–1 West Ham United 4 February 1986
Replay Ipswich Town 0–1 West Ham United 6 February 1986
12 Hull City 2–3 Brighton & Hove Albion 25 January 1986
13 Chelsea 1–2 Liverpool 26 January 1986
14 Arsenal 5–1 Rotherham United 25 January 1986
15 York City 2–0 Altrincham 25 January 1986
16 Peterborough United 1–0 Carlisle United 25 January 1986

Question: In the 1985-86 FA Cup fourth round proper, what is the away team if the date is '25 January 1986' and if the tie no. "6" is?