QUES: Q: Who is the economist who said there was about $1.7 billion in lost opportunity costs because of the 2007 changes?
A: For example, a 2007 North American rule change cost an estimated $500 million to $1 billion, and Utah State University economist William F. Shughart II has estimated the lost opportunity cost at around $1.7 billion USD.
Does the answer answer the question?

ANS: yes

QUES: Q: where are aircraft manufactured
A: Many towns have encouraged small-scale light industries, such as Crewkerne's Ariel Motor Company, one of the UK's smallest car manufacturers.
Does the answer answer the question?

ANS: no

QUES: Q: In what year did Elizabeth's son's ex-wife die?
A: Moments of sadness for her include the death of her father, aged 56; the assassination of Prince Philip's uncle, Lord Mountbatten; the breakdown of her children's marriages in 1992 (her annus horribilis); the death in 1997 of her son's former wife, Diana, Princess of Wales; and the deaths of her mother and sister in 2002.
Does the answer answer the question?

ANS: yes

QUES: Q: What is the main function of journalism or historical documentation?
A: As a result, the writing in these fields often lacks a literary quality, although it often(and in its better moments)has that quality.
Does the answer answer the question?

ANS:
no