<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>What is the smallest amount of freight carried on the road that closed on March 31 and reached super B capacity on February 17 after 2011?

SQL Table Create Statement:
CREATE TABLE table_name_80 (freight_carried_s_tonne INTEGER, year VARCHAR, road_closed VARCHAR, super_b_capacity_reached_ VARCHAR, _citation_needed_ VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT MIN(freight_carried_s_tonne) FROM table_name_80 WHERE road_closed = "march 31" AND super_b_capacity_reached_[_citation_needed_] = "february 17" AND year > 2011</codeend><|end|>