How many segment C are there in the episode where segment D is bicycle tires?
CREATE TABLE table_15187735_20 (
    segment_c VARCHAR,
    segment_d VARCHAR
)
SELECT COUNT(segment_c) FROM table_15187735_20 WHERE segment_d = "Bicycle Tires"
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 many segment C are there in the episode where segment D is bicycle tires? ### Input: CREATE TABLE table_15187735_20 (
    segment_c VARCHAR,
    segment_d VARCHAR
) ### Response: SELECT COUNT(segment_c) FROM table_15187735_20 WHERE segment_d = "Bicycle Tires"