How many laps for a grid of over 18 and retired due to electrical failure?
CREATE TABLE table_57793 (
    "Driver" text,
    "Constructor" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real
)
SELECT SUM("Laps") FROM table_57793 WHERE "Grid" > '18' AND "Time/Retired" = 'electrical'
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: How many laps for a grid of over 18 and retired due to electrical failure? ### Input: CREATE TABLE table_57793 (
    "Driver" text,
    "Constructor" text,
    "Laps" real,
    "Time/Retired" text,
    "Grid" real
) ### Response: SELECT SUM("Laps") FROM table_57793 WHERE "Grid" > '18' AND "Time/Retired" = 'electrical'