Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_27987623_4 (rank_timeslot_ VARCHAR, airdate VARCHAR)
### Question:
what is the total rank on airdate march 30, 2011?
### Answer:
SELECT COUNT(rank_timeslot_) FROM table_27987623_4 WHERE airdate = "March 30, 2011"