The Ungrateful Heart (Neapolitan: Core 'ngrato ) is a 1951 Italian melodrama film directed by  Guido Brignone and starring  Carla Del Poggio, Frank Latimore and Gabriele Ferzetti.
 It takes its name from the Neapolitan song "Core 'ngrato".
"Santa Lucia" (] , ] ) is a traditional Neapolitan song.
 It was translated by Teodoro Cottrau (1827–1879) into Italian and published by the Cottrau firm, as a "barcarolla", in Naples in 1849.
 Cottrau translated it from Neapolitan into Italian during the first stage of the "Risorgimento", the first Neapolitan song to be given Italian lyrics.
 Its transcriber, who is very often credited as its composer, was the son of the French-born Italian composer and collector of songs Guillaume Louis Cottrau (1797–1847).
 Various sources credit A. Longo with the music, 1835.
"’O sole mio " (] ) is a globally known Neapolitan song written in 1898.
 Its lyrics were written by Giovanni Capurro and the music was composed by Eduardo di Capua and Alfredo Mazzucchi (1878–1972).
 There are other versions of "’O sole mio " but it is usually sung in the original Neapolitan language. "’
O sole mio " is the Neapolitan equivalent of standard Italian "Il mio sole " and translates literally as "my sunshine".
Giovanni Capurro (February 5, 1859 – January 18, 1920) was an Italian poet, best remembered today as the co-creator, with singer/composer Eduardo Di Capua, of the world famous song, "'O Sole mio".
"Guaglione" is a Neapolitan song with music by Giuseppe Fanciulli and words by Nicola "Nisa" Salerno.
 This original version of the song was the winning song at the IV Festival di Napoli which was broadcast on radio in 1956.
 "Guaglione" (] ) is Neapolitan for "boy", but as slang can mean "street urchin", "corner boy", etc.
 The word "guaglione" has appeared as "wallyo" in New York immigrant slang.
"Santa Lucia Luntana" is a Neapolitan song written by E. A. Mario in 1919.
 (There is also a different Neapolitan song transcribed by Cottreau into Italian as "Santa Lucia"; "Santa Lucia Luntana" is sometimes referred to as "Santa Lucia", leading to confusion.)
 The song is very popular in the repertoire of many singers.
 Mario Lanza ("Mario!
 Lanza at His Best," 1959); Luciano Pavarotti ["The Best (Disc 2)," 2005]; and Russell Watson ("Reprise," 2003) recorded notable versions.
 Italian-American tenor Sergio Franchi covered it in 1963 on his RCA Victor Red Seal album, "Our Man From Italy."
 Also recorded by Mario Frangoulis in his CD "Passione - Mario sings Mario", recorded in 2007 with the Ossipov National Orchestra of Russia, with Vladimir Ponkin as the conductor.
"Just Say I Love Her" ("Just Say I Love Him" when recorded by a female singer) is a popular song, adapted from the Neapolitan song "Dicitencello vuie".
 The original music was written by Neapolitan composer Rodolfo Falvo; arrangement in US by Jack Val and Jimmy Dale; the original Neapolitan lyrics by Enzo Fusco, and English lyrics by Martin Kalmanoff and Sam Ward.
The Festival della Canzone Napoletana ("Festival of Neapolitan Song"), commonly known as the Festival di Napoli, is a Neapolitan song contest.
 The first edition was held in 1952 and the last in 2004.
 From 1952 to 1970 the show was broadcast on RAI and from 1998 to 2004, in a differently spirited version, by Rete 4.
Gurkhan was a Mongol title meaning "chief of Khans" and roughly equivalent to the older word "khagan".
 It was held by the rulers of the Kara-Khitai in the 13th century.
 The title was first recorderd in the history after Yelü Dashi founded Kara-Khitan Khanate.
 It comes from the Mongol Gür / Kür, meaning "wide" or "general".
 Christopher I. Beckwith claims that the title has the meaning "the ruler of the earth" in his book Empires of Silk Road.
Canzone napoletana (] ), sometimes referred to as Neapolitan song, is a generic term for a traditional form of music sung in the Neapolitan language, ordinarily for the male voice singing solo, although well represented by female soloists as well, and expressed in familiar genres such as the lover's complaint or the serenade.
 It consists of a large body of composed popular music—such songs as "'O Sole mio"; "Torna a Surriento"; "Funiculì, Funiculà"; "Santa Lucia" and others.

Question: Which world-famous Neapolitan song has lyrics by Giovanni Capurro and a title meaning "my sunshine"?
Answer: ’O sole mio