user: Question: What is the mean number of goals when the rank's less than 8 and there are 261 matches?
Columns: ['Rank', 'Name', 'Years', 'Matches', 'Goals']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Serhiy Rebrov', '1992–2007', 261.0, 123.0]
SQL:

assistant: SELECT AVG("Goals") FROM "Table" WHERE "Rank" < 8.0 AND "Matches" = 261.0;