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_21249915_1 (small__100ha_ VARCHAR, medium__500ha_ VARCHAR)
### Question:
How many Small catagories are there for the department that has a medium of 17101? 
### Answer:
SELECT COUNT(small__100ha_) FROM table_21249915_1 WHERE medium__500ha_ = 17101