instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
Which British engineer designed the Forth Bridge and the original Aswan Dam?
answer:
benjamin baker

question:
What word is used in mathematics to mean if and only if?
answer:
if and only if

question:
Who was largely responsible for the development of the jet engine, seeing the first application of his engine installed in a Gloster aircraft in 1941?
answer:
frank whittle