Based on the clue 'copied on paper by memory', what is the answer?

Based on the clue 'copenhagens tivoli gardens town hall square lie o...', what is the answer? Based on the clue 'copernicus belief that the earth revolves around t...', what is the answer? Based on the clue 'copernicus changed the views in this scientific pr...', what is the answer? Based on the clue 'copernicus was a a crack student at jagiellonian u...', what is the answer? Based on the clue 'copley square hotel the omni parker house back bay...', what is the answer? Based on the clue 'coppelia is subtitled the girl with enamel eyes be...', what is the answer? Based on the clue 'coppelius dr miracle appear in the tales of him', what is the answer? What is referred to by 'copper boron'?