user: Question: What is the highest value of PF when Ends Lost is 51?
Columns: ['Locale', 'Skip', 'W', 'L', 'PF', 'PA', 'Ends Won', 'Ends Lost', 'Blank Ends', 'Stolen Ends', 'Shot Pct.']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['Alberta', 'Randy Ferbey', 9.0, 2.0, 90.0, 58.0, 48.0, 43.0, 7.0, 9.0, '86%']
SQL:

assistant: SELECT MAX("PF") FROM "Table" WHERE "Ends Lost" = 51.0;