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"While Stirling has a proud track record of successfully staging major music events, Radio 2 in the Park will be our biggest one yet."
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一款刚迈过临床门槛的新药，真能成为长春高新的救命稻草？
- assignment: Array of booleans. If the formula is satisfiable provide an assignment for each variable from 1 to N. If the formula is not satisfiable this field is null.