When did Prime Minister Agathe Uwilingiyimana's mandate end?
CREATE TABLE table_60923 (
    "Name a" text,
    "Country" text,
    "Office" text,
    "Mandate start" text,
    "Mandate end" text,
    "Term length" text
)
SELECT "Mandate end" FROM table_60923 WHERE "Office" = 'prime minister' AND "Name a" = 'agathe uwilingiyimana'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When did Prime Minister Agathe Uwilingiyimana's mandate end? ### Input: CREATE TABLE table_60923 (
    "Name a" text,
    "Country" text,
    "Office" text,
    "Mandate start" text,
    "Mandate end" text,
    "Term length" text
) ### Response: SELECT "Mandate end" FROM table_60923 WHERE "Office" = 'prime minister' AND "Name a" = 'agathe uwilingiyimana'