Question: Are both Scott Sanders and Alberto Cavalcanti Brazillian film directors?

Context paragraphs:
Scott Sanders (director): Scott Sanders is an American screenwriter and film director.  He is best known for his work with the films "Black Dynamite" and "Thick as Thieves".

Herr Puntila and His Servant Matti (1960 film): Herr Puntila and His Servant Matti (German: Herr Puntila und sein Knecht Matti) is a 1960 Austrian comedy film directed by Alberto Cavalcanti and starring Curt Bois, Heinz Engelmann and Maria Emo.  It was made at the Soviet-controlled Rosenhügel Studios in Vienna.  Production began in 1955, but wasn't completed until 1960.  The film is based on the play of the same name by Bertolt Brecht.

Rien que les heures: Rien que les heures (English: Nothing But Time or Nothing But the Hours) is a 1926 experimental silent film by Brazilian director Alberto Cavalcanti showing the life of Paris through one day in 45 minutes.  Cavalcanti made a similar film about Berlin the next year.

Coal Face: Coal Face is a 1935 British documentary film short directed by Alberto Cavalcanti.  With a film score by Benjamin Britten and a poem written and narrated by W.H. Auden, the film gives a glimpse into the lives of a Scottish mining community and the dangerous working conditions the miners routinely faced.

Die Windrose: Die Windrose ("The Windrose") was a film made for the East German production company DEFA in 1957 and commissioned by the World Federation of Women.  Alberto Cavalcanti was film director, with artistic input from Joris Ivens.  Simone Signoret, Yves Montand and Helene Weigel, wife of German dramatist Bertold Brecht, collaborated in the making of this film, a docu-drama about the struggle of female workers in Italy, Brazil, the Soviet Union, China and France.

Squadron 992: Squadron 992 is a 23-minute 1940 British propaganda film produced by the General Post Office GPO Film Unit of the Ministry of Information and re-distributed by the National Film Board of Canada (NFB) as part of their wartime "Canada Carries On" series.  The film was directed by Harry Watt and produced by Alberto Cavalcanti.  "Squadron 992" describes the training and operations in 1940 of No. 992 (Barrage Balloon) Squadron RAF, a Royal Air Force (RAF) barrage balloon unit stationed in the United Kingdom.  The film's French version title was "Escadrille 992".

Song of the Sea (1952 film): Song of the Sea (Portuguese: O Canto do Mar ) is a 1952 Brazilian drama film directed by Alberto Cavalcanti.  It was entered into the 1954 Cannes Film Festival.

Dead of Night: Dead of Night is a 1945 British anthology horror film (a gothic or horror anthology) made by Ealing Studios; the individual stories were directed by Alberto Cavalcanti, Charles Crichton, Basil Dearden and Robert Hamer.  The film stars Mervyn Johns, Googie Withers, Sally Ann Howes and Michael Redgrave.  The film is probably best-remembered for the ventriloquist's dummy episode with Redgrave.

Night Mail: Night Mail is a 1936 documentary film about a London, Midland and Scottish Railway (LMS) mail train from London to Scotland, produced by the GPO Film Unit.  The film ends with a "verse commentary" by W. H. Auden, written for existing footage.  Benjamin Britten scored the film.  The film was directed by Harry Watt and Basil Wright, and narrated by John Grierson and Stuart Legg.  The Brazilian filmmaker Alberto Cavalcanti was sound director.  The locomotive featured in the film was Royal Scot 6115 "Scots Guardsman", built in 1927.  The film has become a classic of its own kind, much imitated by adverts and modern film shorts.  "Night Mail" is widely considered a masterpiece of the British Documentary Film Movement.

Alberto Cavalcanti: Alberto de Almeida Cavalcanti (February 6, 1897 – August 23, 1982) was a Brazilian-born film director and producer.

Supporting paragraphs: Scott Sanders (director) Alberto Cavalcanti
Answer: no