Exercise 1.2 - Solution

(a) The contest was first held in 1956: record (it appears in the contest's own records and reliable reference works).
(b) A country that once scored zero is forever "the country that always gets nul points": folklore (it contains truth, but the version people repeat is tidier than the facts).
(c) A favourite act's costume from a particular year: memory (good for atmosphere, unreliable for exact details).