what is the channel width that overlaps channels 1,3-6?
CREATE TABLE table_18509 (
    "Channel" real,
    "Center Frequency" text,
    "Frequency delta" text,
    "Channel Width" text,
    "Overlaps Channels" text
)
SELECT "Channel Width" FROM table_18509 WHERE "Overlaps Channels" = '1,3-6'
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 is the channel width that overlaps channels 1,3-6? ### Input: CREATE TABLE table_18509 (
    "Channel" real,
    "Center Frequency" text,
    "Frequency delta" text,
    "Channel Width" text,
    "Overlaps Channels" text
) ### Response: SELECT "Channel Width" FROM table_18509 WHERE "Overlaps Channels" = '1,3-6'