Question: Which U.S. Hot has 13 as the U.S. R&B?
SQL: SELECT "U.S. Hot 100" FROM "2-18519524-3" WHERE "U.S. R&B" = '13';

Question: What U.S. Rap has Life in the Concrete Jungle as the album?
SQL: SELECT "U.S. Rap" FROM "2-18519524-3" WHERE "Album" = 'Life in the Concrete Jungle';