What was the location of the fight when Gassaway fought kevin knabjian?
CREATE TABLE table_50638 (
    "Res." text,
    "Record" text,
    "Opponent" text,
    "Method" text,
    "Round" text,
    "Location" text
)
SELECT "Location" FROM table_50638 WHERE "Opponent" = 'kevin knabjian'
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: What was the location of the fight when Gassaway fought kevin knabjian? ### Input: CREATE TABLE table_50638 (
    "Res." text,
    "Record" text,
    "Opponent" text,
    "Method" text,
    "Round" text,
    "Location" text
) ### Response: SELECT "Location" FROM table_50638 WHERE "Opponent" = 'kevin knabjian'