The Golden Shell (Spanish: "Concha de Oro" ; Basque: "Urrezko Maskorra" ) is the highest prize given to a competing film at the San Sebastián Film Festival.
 It was introduced in 1957.
 In 1953 and 1954, the highest prize had been called the Gran Premio.
 In 1955 and 1956 it was replaced by the Silver Shell.
 Five directors have won the Golden Shell twice: American director Francis Ford Coppola (in 1969 & 1984), Spanish director Manuel Gutiérrez Aragón (in 1982 & 1986), Mexican director Arturo Ripstein (in 1993 & 2000), Iranian director Bahman Ghobadi (in 2004 & 2006) and Spanish director Imanol Uribe (in 1994 & 1996).
Ashkan Kooshanejad, (Persian: اشکان کوشانژاد; born August 13, 1985) also known as Ash Koosha is an Iranian multi-instrumentalist composer, record producer, film director and futurist living in London, United Kingdom.
 He mainly plays synthesiser, bass and guitar.
 He played the lead role in an Iranian-Cannes jury prize winner docufiction film by director Bahman Ghobadi called "No One Knows About Persian Cats", which follows his band's story scouring the Iranian underground music scene trying to find musicians to play in a festival in the UK.
Bahman Ghobadi (Persian: بهمن قبادی‎ ‎ ; Kurdish: به‌همه‌ن قوبادی / Behmen Qubadî) is an Iranian film director, producer and writer of Kurdish ethnicity.
 He was born on February 1, 1969 in Baneh, Kurdistan province.
 Ghobadi belongs to the "new wave" of Iranian cinema.
Kambuzia Partovi (also spelt Kambozia Partovi, born 11 November 1955 in Rasht) (Persian: کامبوزیا پرتوی‎ ‎ ) is an Iranian film director and scriptwriter.
 He was born in Rasht, Iran on the Caspian Sea.
 After studying theater arts in school he wrote mainly scripts for TV series.
 In 1988 he made his feature film debut with "Golnar".
 His 2007 film "Café Transit" which got the special mention at Mar del Plata film festival was selected by Iran as its candidate for the Academy Award for Best Foreign Language Film.
 He has also written screenplays for other directors, most notably Jafar Panahi's "The Circle".
 Partovi trained and supported many Iranian artists and film makers, most notably Bahman Ghobadi.
 In 2013 he acted in and co-directed "Closed Curtain" with Panahi.
No One Knows About Persian Cats (Persian: کسی از گربه های ایرانی خبر نداره‎ ‎ ) is a 2009 Iranian film directed by Bahman Ghobadi produced by Wild Bunch.
 Originally titled Kasi az Gorbehaye Irani Khabar Nadareh, in the film's native language, Persian, this film first took on the name of "Nobody Knows About the Persian Cats" before finally being titled "No One Knows About Persian Cats".
 The film offers perspective of Iran as it explores its underground rock scene.
 It won the Special Jury Prize Ex-aequo in the Un Certain Regard section at the 2009 Cannes Film Festival.
Marooned in Iraq (Persian: گم‌گشتگی در عراق/Gomgashtei dar Aragh‎ ‎ , and also known as "Songs of My Motherland" Persian: آوازهای سرزمین مادری‌ام‎ ‎ ) is a 2002 Iranian (Kurdish/Persian) film directed by Bahman Ghobadi and produced in Iran.
 It was screened in the Un Certain Regard section at the 2002 Cannes Film Festival.
Golshifteh Farahani (Persian: گلشیفته فراهانی , also Romanized as "Golŝifte Farāhāni" and "Golšifteh Farāhāni", born 10 July 1983) is an Iranian actress, musician and singer who lives in France.
 Golshifteh has acted in 25 films, many of which have received international recognition.
 She was nominated for the Most Promising Actress Award for "The Patience Stone" at the 2014 Cesar Awards in France, and won the Best Actress Award for "Boutique" from the 26th Nantes Three Continents Festival (France).
 In recent years she has played a leading role in movies by well-known Iranian and international directors, including Asghar Farhadi, Bahman Ghobadi, Rasool Mollagholipoor, Jim Jarmusch, Ridley Scott, Joachim Rønning, Espen Sandberg.
Turtles Can Fly (Persian: لاک پشت ها هم پرواز می کنند Lakposhthâ ham parvaz mikonand, Kurdish: "Kûsî Jî Dikarin Bifirin" Sorani Kurdish: کیسەڵەکان دەفڕن Turkish: "Kaplumbağalar Da Uçar") is a 2004 Kurdish war drama film written, produced, and directed by Bahman Ghobadi, with notable theme music composed by Hossein Alizadeh.
 It was the first film to be made in Iraq after the fall of Saddam Hussein.
William Castle (April 24, 1914 – May 31, 1977) was an American film director, producer, screenwriter, and actor.
A Time for Drunken Horses (Central Kurdish: کاتێک بۆ مەستیی ئەسپەکان‎ , Persian: زمانی برای مستی اسب‌ها‎ ‎ , "Zamani barayé masti asbha", Kurdish: Demek jibo hespên serxweş‎ ) is a 2000 Iranian (Kurdish/Persian) film directed by Bahman Ghobadi and produced in Iran.
 It was a co-winner of the "Caméra d'Or" award at the Cannes Film Festival in 2000 .

Question: Are Bahman Ghobadi and William Castle both American film directors?
Answer: no