Table schema:
CREATE TABLE table_name_12 (big__ INTEGER, total VARCHAR, micro__10ha_ VARCHAR, department VARCHAR)

Question: Which Big (>500ha) has a Micro (10ha) larger than 940, and a Department of potosí, and a Total smaller than 16,240?
SQL: SELECT MAX(big__) > 500 AS ha_ FROM table_name_12 WHERE micro__10ha_ > 940 AND department = "potosí" AND total < 16 OFFSET 240