useless trivia: What Word Means: Cuena, A Primitive Vertical Reed Flute?

Questions

25 January 1974 Christian ---------- transplants 1st human heart without removal of old ?

20 January 1974 USSR performs ---------- at Eastern Kazakstan/Semipalatinsk USSR ?

21 January 1974 McDonald's founder ---------- buys San Diego Padres ?

02 February 1974 Barbra ---------- 's 1st #1 hit, "The Way We Were" ?

04 February 1974 ---------- Nim Chimsky signs his 1st word, at 21/2 months ?