What is referred to by 'coimbra aveiro'?

What is referred to by 'cognitive deterioration sometimes senile'? Which performer is associated with 'cohan'? Based on the clue 'cohen greenfield are the last names of the co fou...', what is the answer? Based on the clue 'coherant xenix are 2 of these part of the abbrevi...', what is the answer? 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? Based on the clue 'coincidentally today fathers squash opponent was a...', what is the answer? Based on the clue 'coinciding with the 84 olympics in la was a memori...', what is the answer?