how long did bob martinez serve as director ?
CREATE TABLE table_203_376 (
    id number,
    "no." number,
    "name" text,
    "term of office" text,
    "president(s) served under" text
)
SELECT "term of office" - "term of office" FROM table_203_376 WHERE "name" = 'bob martinez'
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 did bob martinez serve as director ? ### Input: CREATE TABLE table_203_376 (
    id number,
    "no." number,
    "name" text,
    "term of office" text,
    "president(s) served under" text
) ### Response: SELECT "term of office" - "term of office" FROM table_203_376 WHERE "name" = 'bob martinez'