<|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|>On September 10 during Strikeforce: Heavyweight Grand Prix Semifinals, what was the PPV buyrate?

SQL Table Create Statement:
CREATE TABLE table_name_77 (ppv_buyrate VARCHAR, date VARCHAR, event VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT ppv_buyrate FROM table_name_77 WHERE date = "september 10" AND event = "strikeforce: heavyweight grand prix semifinals"</codeend><|end|>