When 87 mpg-e (39kw-hrs/100mi) is the epa rated combined fuel economy how many operating modes are there?
CREATE TABLE table_27014 (
    "Vehicle" text,
    "Operating mode" text,
    "EPA rated All-electric range" text,
    "EPA rated combined fuel economy" text,
    "Clean electric grid California (San Francisco)" text,
    "U.S. national average electric mix" text,
    "Dirty electric grid Rocky Mountains (Denver)" text
)
SELECT COUNT("Operating mode") FROM table_27014 WHERE "EPA rated combined fuel economy" = '87 mpg-e (39kW-hrs/100mi)'
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: When 87 mpg-e (39kw-hrs/100mi) is the epa rated combined fuel economy how many operating modes are there? ### Input: CREATE TABLE table_27014 (
    "Vehicle" text,
    "Operating mode" text,
    "EPA rated All-electric range" text,
    "EPA rated combined fuel economy" text,
    "Clean electric grid California (San Francisco)" text,
    "U.S. national average electric mix" text,
    "Dirty electric grid Rocky Mountains (Denver)" text
) ### Response: SELECT COUNT("Operating mode") FROM table_27014 WHERE "EPA rated combined fuel economy" = '87 mpg-e (39kW-hrs/100mi)'