The three core day option is the minimum requirement with a substantial number attending for a full week by choice. (hollinsclough.staffs.sch.uk)
Having said that, I'll stick to eye witness accounts over ice cores any day (and ice cores over tree rings). (illconsidered.blogspot.ru)
Liaising with the Offshore QA team in overseeing core day to day functionalities like Test plan, Test Scenarios, Test Documentation, Test Scripts and Test Cases. (members.climber.com)