user: Question: In 2008, what was the world ranking that ranked 5th in L.A.?
Columns: ['Index (Year)', 'Author / Editor / Source', 'Year of publication', 'Countries sampled', 'World Ranking (1)', 'Ranking L.A. (2)']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Environmental Performance (2008)', 'Yale University', '2008', 149.0, '32nd', '5th']
SQL:

assistant: SELECT "World Ranking (1)" FROM "Table" WHERE "Ranking L.A. (2)" = '5th' AND "Year of publication" = '2008';