Question:  Were both James W. Horne and Larisa Shepitko screenwriters?

Context paragraphs:
Dinara Asanova: Dinara Asanova (Russian: Динара Кулдашевна Асанова ) (24 November 1942 – 4 April 1985) was a Kyrgyzstani-Soviet film director.  She graduated high school in 1959 and began to work for Kyrgyzfilm from 1960-1962.  She studied at VGIK and graduated in 1968.  During her time there, she worked on Larisa Shepitko's 1963 film "Heat".

The Ascent: The Ascent (Russian: Восхождение , tr.  "Voskhozhdeniye") is a 1977 black-and-white Soviet drama film directed by Larisa Shepitko and made at Mosfilm.  The movie was shot in January 1974 near Murom, Vladimir Oblast, Russia, in appalling winter conditions, as required by the script, based on the novel "Sotnikov" by Vasil Bykaŭ.  It was Shepitko's last film before her death in a car accident in 1979.  The film won the Golden Bear award at the 27th Berlin International Film Festival in 1977.  It was also selected as the Soviet entry for the Best Foreign Language Film at the 50th Academy Awards, but was not accepted as a nominee.

Larisa Shepitko: Larisa Efimovna Shepitko (Russian: Лари́са Ефи́мовна Шепи́тько ; Ukrainian: Лариса Юхимівна Шепітько ; 6 January 1938 – 2 July 1979) was a Soviet film director, screenwriter and actress.

James W. Horne: James Wesley Horne (December 14, 1881June 29, 1942) was an early American actor, screenwriter and film director.  He began his career as an actor under director Sidney Olcott at Kalem Studios in 1913 and directed his first film for the company two years later.

Wings (1966 film): Wings (Russian: Крылья , tr.  "Krylya") is a 1966 Soviet black and white drama film directed by Ukrainian filmmaker Larisa Shepitko, her first feature film made after graduating from the All-Russian State Institute for Cinematography.  In 1979, the little known director, screenwriter and actress died in a car accident, leaving behind only a small artistic output of four films.

Elem Klimov: Elem Germanovich Klimov (Russian: Эле́м Ге́рманович Кли́мов ; 9 July 1933 – 26 October 2003) was a Soviet Russian film director.  He studied at VGIK, and was married to film director Larisa Shepitko.  Klimov is best known in the West for his final film, 1985's "Come and See" ("Иди и смотри"), which follows a teenage boy in German-occupied Belarus during the German-Soviet War and is often considered one of the greatest war films ever made.  He also directed dark comedies, children's movies, and historical pictures.

Boris Plotnikov: Boris Grigoryevich Plotnikov (Russian: Борис Григорьевич Плотников , born 2 April 1949) is a Soviet and Russian film actor.  His film debut was as Sotnikov in "The Ascent", the acclaimed final film of Russian director Larisa Shepitko.

27th Berlin International Film Festival: The 27th annual Berlin International Film Festival was held from 24 June – 5 July 1977.  The festival opened with "Nickelodeon" by Peter Bogdanovich.  The Golden Bear was awarded to the Soviet Union film "The Ascent" directed by Larisa Shepitko.  The retrospective dedicated to Marlene Dietrich was shown at the festival.  It was divided into two parts, "Part 1" was shown this year.

James W. Gay: Dr. James W. Gay was a herbal Indian medicine man.  He was born in the Miami Village on the Wabash River, in the year 1840, and stayed with them until 1854.  Dr. James W. Gay's father came from Scotland where he was born in the year 1787.  His father practiced medicine among the Miami and Delaware tribes of Indians and white settlers, along the Wabash River.  It was there his father met his mother, (half Miami).  Dr. James W. Gay did not get along with the Miami chief, so he left the tribe and set out a life of adventure.  He followed the setting sun and joined the Pawnees on the Missouri River in the Fall of 1854.  He stayed with the Pawnee and helped them with hunting and war.  The Sioux was a tribe that had killed his brother.  While with the Pawnee's he was at war almost continuously with the Sioux, River, Crows, and Black Foot Indian Tribes in which he was wounded three times.

Pavel Lebeshev: Pavel Timofeevich Lebeshev (Russian: Павел Тимофеевич Лебешев ; 15 February 1940, Moscow - 23 February 2003, Moscow) was a Soviet and Russian cinematographer.  Pavel Lebeshev graduated from the Gerasimov Institute of Cinematography in 1972 and worked with many famous Soviet and Russian directors, including Nikita Mikhalkov, Georgi Daneliya and Larisa Shepitko.

Supporting paragraphs: James W. Horne Larisa Shepitko
Answer: yes