1991–92 FA Cup
Sixth Round Proper
Table:
Tie no

Home team

Score

Away team

1
Liverpool
1–0
Aston Villa

2
Southampton
0–0
Norwich City

replay
Norwich City
2–1
Southampton

3
Portsmouth
1–0
Nottingham Forest

4
Chelsea
1–1
Sunderland

replay
Sunderland
2–1
Chelsea

Having looked at the following table concerning '1991–92 FA Cup' in the 'Sixth Round Proper' section, draft a brief sentence that explains what the highlighted cells show and return it as JSON: {"answer": "YOUR ANSWER"}.