user: Question: what fleet is associated with the number L4?
Columns: ['Number', 'Name', 'Meaning', 'Fleet', 'Launched']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['L1', 'Leninets (Ленинец)', 'Follower of Lenin', 'Baltic', '28 February 1931']
SQL:

assistant: SELECT "Fleet" FROM "Table" WHERE "Number" = 'L4';