Who is the GC leader at vila - segovia?
CREATE TABLE table_54613 (
    "Stage" real,
    "Date" text,
    "Course" text,
    "Distance" text,
    "Winner" text,
    "GC Leader" text
)
SELECT "GC Leader" FROM table_54613 WHERE "Course" = 'ávila - segovia'
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 is the GC leader at vila - segovia? ### Input: CREATE TABLE table_54613 (
    "Stage" real,
    "Date" text,
    "Course" text,
    "Distance" text,
    "Winner" text,
    "GC Leader" text
) ### Response: SELECT "GC Leader" FROM table_54613 WHERE "Course" = 'ávila - segovia'