Are Tadeusz Konwicki and Danny Leiner both film directors ?
yes
Danny Leiner
Danny Leiner is a film director whose credits include "The Great New Wonderful", "Harold & Kumar Go to White Castle", "Dude, Where's My Car?
", "Layin' Low", and "Time Expired".
Tadeusz Konwicki
Tadeusz Konwicki (22 June 1926 – 7 January 2015) was a Polish writer and film director, as well as a member of the Polish Language Council.
The Little Apocalypse (1993 film)
The Little Apocalypse (French: La Petite Apocalypse ) is a 1993 French comedy film, an adaptation of Tadeusz Konwicki's novel, directed by Costa-Gavras.
 It was entered into the 43rd Berlin International Film Festival.
 It follows the trials of a Pole who lives in France who wants his written work published.
 Unable to get anywhere, he starts to enlist help from others, resorting to some unusual extremes. A Tale of Adam Mickiewicz's 'Forefathers' Eve'
A Tale of Adam Mickiewicz's 'Forefathers' Eve' (Polish: "Lawa.
 Opowieść o 'Dziadach' Adama Mickiewicza" ) is a 1989 Polish drama film directed by Tadeusz Konwicki.
 It was entered into the 16th Moscow International Film Festival. Salto (film)
Salto is a 1965 Polish drama film written and directed by Tadeusz Konwicki.
 It was released on 11 June 1965 in Poland.
 The director of photography is Kurt Weber and the music was by Wojciech Kilar.
 The title can be translated as "somersault" in English, or it can be seen as a reference to a rhythmic dance movement.
 The film received an Honorary Diploma at the Edinburgh International Film Festival, 1967. The Last Day of Summer
The Last Day of Summer (Polish: Ostatni dzień lata ) is a 1958 romantic drama film directed by the Polish film director Tadeusz Konwicki. How Far Away, How Near
How Far Away, How Near (Polish: Jak daleko stąd, jak blisko ) is a 1972 film directed by Tadeusz Konwicki. The Issa Valley (film)
The Issa Valley (Polish: Dolina Issy ) is a 1982 film adaptation of 1955 novel by Czesław Miłosz, directed by Tadeusz Konwicki. All Souls' Day (film)
All Souls' Day is the English title for "Zaduszki", a film released in 1962, directed by the Polish film director Tadeusz Konwicki. A Chronicle of Amorous Accidents
A Chronicle of Amorous Accidents (Polish: Kronika wypadków miłosnych ) is a 1986 Polish drama film directed by Andrzej Wajda, starring Paulina Młynarska and Piotr Wawrzyńczak.
 It tells the story of two Polish adolescents who fall in love on the eve of World War II.
 The film is based on the novel of the same title by Tadeusz Konwicki.
 It premiered in Poland on 24 November 1986.