Mezue ahịrịokwu na-esonụ: N'afọ 1968, "The Joke" bụ ihe nkiri nke onye nduzi Czech New Wave director Jaromil Jireš, ma ihe nkiri ahụ bụ ihe fọrọ nke nta ka ọ bụrụ ozugbo a machibidoro iwu na-esote
Ọ bụ mwakpo ndị Warsaw Pact mere ka Prague Spring kwụsị.