Question:
provide evidence that long-term PM exposure leads to the development of chronic bronchitis in the U.S.

Does it follow that "Nobody has ever attempted to correlate PM and chronic bronchitis."?
Answer:
no

Question:
Havana's delicious Cathedral Square, the focus of Habana Vieja life, could be a stage set.

Does it follow that "Cathedral Square is the focus of Habana Vieja life and it is an integral part of their culture."?
Answer:
it is not possible to tell

Question:
ratings they received for their responsibilities, commitments, and retention standard.

Does it follow that "For their responsibilities, they received ratings."?
Answer:
yes

Question:
Today the islands' pretty beaches provide the perfect weekend retreat location for the people of Istanbul.

Does it follow that "Nobody visits the Islands because the beaches are dirty and disgusting."?
Answer:
no