Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[Q]: Context: On 26 March 1991, Singapore Airlines Flight 117 was hijacked in flight by four male passengers from Pakistan. 
 Question: When did Singapore Airlines Flight 117 occur?
[A]: 26 march 1991


[Q]: Context: Castigliano's method, named for Carlo Alberto Castigliano, is a method for determining the displacements of a linear-elastic system based on the partial derivatives of the energy. 
 Question: Who was the original discoverer of Castigliano's method?
[A]: carlo alberto castigliano


[Q]: Context: Thomas More Madden (1838 -- 14 April 1902) was an Irish physician and writer, son and biographer of Richard Robert Madden. 
 Question: Who is the paternal progenitor of Thomas More Madden?
[A]:
richard robert madden