What year had a 1st round playoff in the NASL indoor league?
CREATE TABLE table_14387 (
    "Year" text,
    "Division" text,
    "League" text,
    "Reg. Season" text,
    "Playoffs" text,
    "Open Cup" text
)
SELECT "Year" FROM table_14387 WHERE "Playoffs" = '1st round' AND "League" = 'nasl indoor'
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 year had a 1st round playoff in the NASL indoor league? ### Input: CREATE TABLE table_14387 (
    "Year" text,
    "Division" text,
    "League" text,
    "Reg. Season" text,
    "Playoffs" text,
    "Open Cup" text
) ### Response: SELECT "Year" FROM table_14387 WHERE "Playoffs" = '1st round' AND "League" = 'nasl indoor'