Question:
The dense undergrowth of their aerial prop roots perform natural land reclamation.

Does it follow that "Natural land reclamationis performed by the dense undergrowth of their aerial prop roots."?
Answer:
yes

Question:
tight confidence interval around the best estimate of the mean concentration-response relationship.

Does it follow that "Tight confidence interval around the best estimate of the mean."?
Answer:
yes

Question:
Sister should read the rules outside the door. I gathered from the little nurse's expression that there was not the least likelihood of her having the hardihood to retail this message to the dreaded "Sister".

Does it follow that "She should ignore the sign with the rules."?
Answer:
no

Question:
Slate article exposing fabricated quotes in the memoirs of former Labor Secretary Robert Reich)?

Does it follow that "At one time the Labor Secretary was Robert Reich."?
Answer:
yes