Who was the trainer with Robert Courtney was owner?
CREATE TABLE table_54513 (
    "Year" real,
    "Winner" text,
    "Jockey" text,
    "Trainer" text,
    "Owner" text,
    "Distance (Miles)" text,
    "Time" text
)
SELECT "Trainer" FROM table_54513 WHERE "Owner" = 'robert courtney'
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: Who was the trainer with Robert Courtney was owner? ### Input: CREATE TABLE table_54513 (
    "Year" real,
    "Winner" text,
    "Jockey" text,
    "Trainer" text,
    "Owner" text,
    "Distance (Miles)" text,
    "Time" text
) ### Response: SELECT "Trainer" FROM table_54513 WHERE "Owner" = 'robert courtney'