Based on the clue 'at harvard this writer proposed that we work 1 day...', what is the answer?

Based on the clue 'at hamlets death he says good night sweet prince', what is the answer? Based on the clue 'at hancock the state is less than 3 miles wide bet...', what is the answer? Based on the clue 'at hardees these sides are beer battered', what is the answer? Based on the clue 'at harvard introduction to game theory is a course...', what is the answer? What is associated with: at her 100th birthday celebration in 1960 she performed a jig with her doctor? What is associated with: at her 1953 coronation she wore special gold bracelets representing sincerity wisdom? What is associated with: at her 1976 bank robbery trial this heiress lawyer used a brainwashing defense the jury didnt… Based on the clue 'at her death aged 81 she was the oldest british mo...', what is the answer?