SELECT venue FROM table_name_28 WHERE year > 2006 AND notes = "3000 m s'chase" AND position = "2nd" AND competition = "african championships"
Tempat mana yang dimiliki Kejuaraan Afrika setelah 2006 dengan posisi S'Chase ke -2 dan 3000 M?
CREATE TABLE table_name_28 (venue VARCHAR, competition VARCHAR, position VARCHAR, year VARCHAR, notes VARCHAR)