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_1942366_9 (category VARCHAR, low VARCHAR)
### Question:
In how many different categories is the value of C_{low} 35.5?
### Answer:
SELECT COUNT(category) FROM table_1942366_9 WHERE STRUCT(low) = "35.5"