user: Question: Name the number of last appearance where team is San Francisco 49ers
Columns: ['Num', 'Team', 'W', 'L', 'PCT', 'PF', 'PA', 'Last appearance', 'Last championship', 'HOME games', 'Home wins', 'Home losses', 'Home Win Pct.', 'ROAD games', 'Road wins', 'Road losses', 'Road Win Pct.']
Types: ['real', 'text', 'real', 'real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'text', 'real', 'real', 'real', 'text']
Sample row: [14.0, 'Dallas Cowboys', 8.0, 6.0, '.571', 317.0, 264.0, 1995.0, 1995.0, 5.0, 4.0, 1.0, '.800', 9.0, 4.0, 5.0, '.444']
SQL:

assistant: SELECT "Last appearance" FROM "Table" WHERE "Team" = 'San Francisco 49ers';