CREATE TABLE table_23508196_5 (number_of_crews VARCHAR2, type_of_unit VARCHAR2)

Name the number of crews for light bombardment group
SELECT number_of_crews FROM table_23508196_5 WHERE type_of_unit = "Light bombardment group"
SELECT "number_of_crews" FROM "table_23508196_5" WHERE "Light bombardment group" = "type_of_unit"