Question: Ekeino to kalokairi is a Greek version of the 1970 film written by whom?

Context paragraphs:
Giannis Spanos: Ioannes "Giannis" Spanos (Greek: Ιωάννης (Γιάννης) Σπανός ; ] ), also transliterated as Yannis Spanos, is a Greek music composer and lyricist.  In his early days as a musician he was also a piano accompanist.  Spanos won the music prize at the 1971 Thessaloniki Film Festival for composing the score of the film "Ekeino to kalokairi".

Codex Marchalianus: Codex Marchalianus designated by siglum Q is a 6th-century Greek manuscript copy of the Greek version of the Hebrew Bible (Tanakh or Old Testament) known as the Septuagint.  The text was written on vellum in uncial letters.  Palaeographically it has been assigned to the 6th century.

Love Story (1970 film): Love Story is a 1970 American romantic drama film written by Erich Segal, who was also the author of the best-selling novel of the same name.  It was produced by Howard G. Minskyand directed by Arthur Hiller and starred Ali MacGraw and Ryan O'Neal, alongside John Marley, Ray Milland, and Tommy Lee Jones in his film debut in a minor role.

Gennithika Gia Sena/Always Broken: "Gennithika Gia Sena" ("Γεννήθηκα Για Σένα" or translated in English "I Was Born For You") and "Always Broken" is a song by Georgian-Greek pop singer Tamta featuring Greek-American DJ and producer Xenia Ghali and is the 23rd single in her entire singles discography.  The Greek version was written by Stan and the English version which is her 6th English song and her 24th single in her singles discography, which was written by Katrina Russ.  The song was digitally released via the iTunes Store by the Greek division of UMG Minos EMI on January 1, 2014.  This song has four different versions which are a Greek Version, English Version, Unplugged Greek Version by Tamta and an EDM Version by Xenia Ghali (feat.  Katt Rockell).  Which by the way all four were composed and produced by Xenia Ghali.

Unmapped: Unmapped is a 2015 contemporary romantic-comedy novel written by Greek writer Nektaria Markakis.  It is the first part in the Unmapped novel series, about Lexi (Alexandra) a woman who lives a programmed life based on her lists, because her parents forbade her having fun as a child.  Chapters of the book where first published in Watt pad in early 2015, becoming quickly successful in both Greek and English having more than 30K views in both languages.  The first four chapters are available to read in Watt pad.  The book can be found in Amazon in the English language.  The Greek version of the book was published in December 2015.  It was unpublished on April 2016.  The English version is still available on Amazon, while the Greek version was uploaded again on Wattpad with extra contect not available in neither Greek or English version.

Pump It: "Pump It" is a 2005 song by The Black Eyed Peas.  It was released as the fourth and final single from The Black Eyed Peas' 2005 album "Monkey Business".  This song was also remixed for the deluxe edition of the group's fifth studio album "The E.N.D" as "Pump It Harder".  "Pump It" heavily incorporates music from Dick Dale's 1962 surf version of the song "Misirlou" (known by many for being featured in the 1994 Quentin Tarantino film "Pulp Fiction").  "Miserlou" (sometimes rendered "Misirlou") is a popular folk song of Eastern Mediterranean origin, with an Egyptian version dating back to 1919, and a Greek version of 1927 which is believed to have been written by Tetos Dimitriadis, the arrangement of which is credited to Nicholas Roubanis for his 1941 released jazz version.

Cambridge Chronicle (medieval): The Cambridge Chronicle, also known as the Tarʾīkh Jazīrat Ṣiqilliya ("History of the Island of Sicily"), is a short, anonymous medieval chronicle covering the years 827–965.  It is the earliest native Sicilian chronicle of the emirate of Sicily, and was written from the perspective of a Sicilian Christian of the 10th or 11th century.  It survives in two versions: a Greek version in two manuscripts and an Arabic version in one.  For years only the Arabic text kept in Cambridge University Library was known, but in 1890 a Greek redaction was discovered.  The Greek texts are found in the Vatican Library and the Bibliothèque nationale de France (Codex Parisinus Graecus 920).  It has been translated into English, Italian and French.

This Is Love (Demy song): "This Is Love" is a song performed by Greek singer Demy.  The song represented Greece in the Eurovision Song Contest 2017, and was written by Dimitris Kontopoulos, Romy Papadea and John Ballard.  The song was released as a digital download on 6 March 2017 through PANIK Records.  On 26 April 2017, a Greek version of the song was released, titled "Oso Zo" (Όσο Ζω, As Long As I Live).

Ekeino to kalokairi: Ekeino to kalokairi (Greek: "Εκείνο το καλοκαίρι" (That Summer)) is an award-winning 1971 Greek film starring Elena Nathanael and Lakis Komninos.  It won the photography and music prizes at the 1971 Thessaloniki Festival of Greek Cinema.  It was the Greek version of the successful 1970 American film "Love Story".  The film was one of the greatest successes of Elena Nathanael and the music of its soundtrack "haunted all the teenage parties of the 1970s".  Its soundtrack features the hit song "San Me Koitas" (When You Look At Me) which has been described as "one of the most beautiful erotic songs of all time".

De Viris Illustribus (Jerome): De Viris Illustribus ("On Illustrious Men") is a collection of short biographies of 135 authors, written in Latin, by the 4th-century Latin Church Father Jerome.  He completed this work at Bethlehem in 392-3 CE.  The work consists of a prologue plus 135 chapters, each consisting of a brief biography.  Jerome himself is the subject of the final chapter.  A Greek version of the book, possibly by the same Sophronius who is the subject of Chapter 134, also survives.  Many biographies take as their subject figures important in Christian Church history and pay especial attention to their careers as writers.  It "was written as an apologetic work to prove that the Church had produced learned men."  The book was dedicated to Flavius Dexter, who served as high chamberlain to Theodosius I and as praetorian prefect to Honorius.  Dexter was the son of Saint Pacianus, who is eulogized in the work.

Supporting paragraphs: Ekeino to kalokairi Love Story (1970 film)
Answer: Erich Segal