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 teaches (ID VARCHAR, semester VARCHAR, YEAR VARCHAR)
### Question:
Find the total number of instructors who teach a course in the Spring 2010 semester.
### Answer:
SELECT COUNT(DISTINCT ID) FROM teaches WHERE semester = 'Spring' AND YEAR = 2010