How many episodes had rating/share (18-49) of 0.7/2 and a rating of 2.1?
CREATE TABLE table_28086 (
    "Episode Number" real,
    "Episode" text,
    "Rating" text,
    "Share" real,
    "Rating/Share (18-49)" text,
    "Viewers (millions)" text,
    "Rank (Timeslot)" real,
    "Rank (Night)" real
)
SELECT COUNT("Episode Number") FROM table_28086 WHERE "Rating/Share (18-49)" = '0.7/2' AND "Rating" = '2.1'
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 episodes had rating/share (18-49) of 0.7/2 and a rating of 2.1? ### Input: CREATE TABLE table_28086 (
    "Episode Number" real,
    "Episode" text,
    "Rating" text,
    "Share" real,
    "Rating/Share (18-49)" text,
    "Viewers (millions)" text,
    "Rank (Timeslot)" real,
    "Rank (Night)" real
) ### Response: SELECT COUNT("Episode Number") FROM table_28086 WHERE "Rating/Share (18-49)" = '0.7/2' AND "Rating" = '2.1'