Complex sentence: Quentin Tarantino announced in 2015's Comic-Con that Ennio Morricone would compose the score for "The Hateful Eight"; the first western scored by Morricone in 40 years, the last in that genre being "A Genius, Two Partners and a Dupe".
Split into simpler sentences: Quentin Tarantino announced in 2015's Comic-Con that Ennio Morricone would compose the score for "The Hateful Eight". Tarantino remarked that it would be the first western scored by Morricone in 40 years, the last in that genre being "A Genius, Two Partners and a Dupe".