Based on the clue 'at camp it signals the afternoon roll call in the ...', what is the answer?

Based on the clue 'at by of are all this part of speech', what is the answer? Based on the clue 'at cambridge charles got his university colors in ...', what is the answer? Based on the clue 'at cambridge this lord of poetry became a lifelong...', what is the answer? Based on the clue 'at cambridge wordsworth saw a statue of this scien...', what is the answer? Based on the clue 'at cana jesus performed his 1st miracle doing this', what is the answer? Based on the clue 'at cape canaveral it follows a countdown', what is the answer? What is associated with: at carnegie hall in 1935 she talked about adventures in flying she disappeared 2 years later? Based on the clue 'at carowinds theme park the thunder road roller co...', what is the answer?