Table: draft_history_30
Columns: round
pick
overall
name
position
college

Question: How many rounds had an overall of 211?
SQL: SELECT COUNT("round") FROM draft_history_30 WHERE "overall" = 211

Question: What is the mean pick number for the cornerback position when the overall is less than 134?
SQL: SELECT AVG("pick") FROM draft_history_30 WHERE "position" = 'cornerback' AND "overall" < 134