How long is the rollar coaster on Kemah Boardwalk
CREATE TABLE table_73987 (
    "Name" text,
    "Park" text,
    "Length (ft)" real,
    "Height (ft)" real,
    "Speed (mph)" text,
    "Opened" text,
    "Status" text
)
SELECT "Length (ft)" FROM table_73987 WHERE "Park" = 'Kemah Boardwalk'
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 long is the rollar coaster on Kemah Boardwalk ### Input: CREATE TABLE table_73987 (
    "Name" text,
    "Park" text,
    "Length (ft)" real,
    "Height (ft)" real,
    "Speed (mph)" text,
    "Opened" text,
    "Status" text
) ### Response: SELECT "Length (ft)" FROM table_73987 WHERE "Park" = 'Kemah Boardwalk'