Based on the clue 'cohen greenfield are the last names of the co fou...', what is the answer?

What is associated with: coffinite discovered in colorado in 1955 is an ore thats 60 this valuable radioactive metal? Based on the clue 'cognac is a type of this liquor that one story say...', what is the answer? What is referred to by 'cognitive deterioration sometimes senile'? Which performer is associated with 'cohan'? Based on the clue 'coherant xenix are 2 of these part of the abbrevi...', what is the answer? What is referred to by 'coimbra aveiro'? Based on the clue 'coin this is the term for the collecting of coins', what is the answer? What is associated with: coincidentally jerome robbins ballet fanfare debuted on the day she was crowned in 1953?