user: Question: What is the average number of years associated with 51 games tied and over 1184 total games?
Columns: ['Pac-12', 'Lost', 'Tied', 'Pct.', 'Years', 'Total Games']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Southern California', 319.0, 54.0, 0.7015, 119.0, 1159.0]
SQL:

assistant: SELECT AVG("Years") FROM "Table" WHERE "Tied" = 51.0 AND "Total Games" > 1184.0;