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.

[Q]: June 2, 1886 saw which US President, the 22nd (and 24th), marry Frances Folsom in the White House, the only president who actually got married at the White House?
[A]: grover cleveland


[Q]: Which semi-aquatic carnivorous mammals belong to the genus `Lutra'?
[A]: otter


[Q]: Gladwyn Jebb served as acting Secretary-General of which organisation until the election of Trygve Lie in 1946?
[A]:
united nations