Question: What is the shared nationality of Louis Jouvet and the mother of Herbert Blaché?

Context articles: Topaze (1933 French film)
Solax Studios
The Infernal Machine (play)
Lady Paname
The Heart of a Nation
Herbert Blaché
Jean Hugo
Théâtre de l'Athénée
Dr. Knock
Louis Jouvet

Topaze is a 1933 French comedy film directed by  Louis J. Gasnier and starring  Louis Jouvet, Simone Héliard and Marcel Vallée.
 It is based on the 1928 play "Topaze" by Marcel Pagnol.
 The same year an American version of the play "Topaze" was released, starring John Barrymore.
 In 1936 Pagnol himself remade the film in France.
Solax Studios was an American motion picture studio founded in 1910 by executives from the Gaumont Film Company of France.
 Alice Guy-Blaché, her husband Herbert, and a third partner, George A. Magie, established The Solax Company.
 Alice Guy-Blaché was artistic director and the director for many of its films, while her husband Herbert Blaché managed production for the new company.
 They took over the studio Gaumont had built in Flushing, New York in 1908 for the production of Chronophone sound films, a venture which proved unsuccessful for Gaumont.
 Solax produced silent films in Flushing from October 1910 to the summer of 1912.
 Prospering, Solax invested more than $100,000 in a modern production plant in 1912 in Fort Lee, New Jersey, which had become the center of America's first motion picture industry.
The Infernal Machine, or La Machine Infernale is a French play by the dramatist Jean Cocteau, based on the ancient Greek myth of Oedipus.
 The play initially premiered on April 10, 1934 at the Theatre Louis Jouvet in Paris, France, under the direction of Louis Jouvet himself, with costumes and scene design by Christian Bérard.
 "The Infernal Machine," as translated by Albert Bermel, was first played at the Phoenix Theatre, New York, on February 3, 1958, under the direction of Herbert Berghof, with scenery by Ming Cho Less, costumes by Alvin Colt, and lighting by Tharon Musser.
Lady Paname was a 1950 drama film, directed and written by Henri Jeanson, and starring Louis Jouvet, Suzy Delair, Henri Guisol and Henri Crémieux.
The Heart of a Nation (French: Untel père et fils ) is a 1943 French drama film directed by Julien Duvivier who co-wrote screenplay with Marcel Achard and Charles Spaak.
 The film stars Raimu, Michèle Morgan and Louis Jouvet.
Herbert Blaché (5 October 1882 – 23 October 1953) was a British-born American film director, producer and screenwriter, born of a French mother.
 He directed 56 films between 1912 and 1929.
Jean Hugo (19 November 1894 – 21 June 1984) was a painter, illustrator, theatre designer and author.
 He was born in Paris and died in his home at the Mas de Fourques, near Lunel, France.
 Brought up in a lively artistic environment, he began teaching himself drawing and painting and wrote essays and poetry from a very early age.
 His artistic career spans the 20th century, from his early sketches of the First World War, through the creative ferment of the Parisian interwar years, and up to his death in 1984.
 He was part of a number of artistic circles that included Jean Cocteau, Raymond Radiguet, Pablo Picasso, Georges Auric, Erik Satie, Blaise Cendrars, Marie-Laure de Noailles, Paul Eluard, Francis Poulenc, Charles Dullin, Louis Jouvet, Colette, Marcel Proust, Jacques Maritain, Max Jacob, Carl Theodor Dreyer, Marie Bell, Louise de Vilmorin, Cecil Beaton and many others.
The Théâtre de l'Athénée is a theatre at 7 rue Boudreau, in the 9th arrondissement of Paris.
 Renovated in 1996 and classified a historical monument, it is among the most beautiful buildings in Paris.
 In addition to its architectural treasures, the Athénée inherits an artistic tradition marked by the figure of Louis Jouvet who directed the theatre from 1934 to 1951.
 During the period when he was director, it became known as the Athenée Théâtre Louis-Jouvet.
Dr. Knock (original title "Knock") is a French comedy film from 1951, directed by Guy Lefranc, written by Georges Neveux, and starring by Louis Jouvet.
 It also features an uncredited appearance by Louis de Funès.
 The movie is based on the 1923 theatre play "Knock ou le Triomphe de la médecine" ("Knock or The Triumph of Medicine") by Jules Romain.
Louis Jouvet (24 December 1887 – 16 August 1951) was a renowned French actor, director, and theatre director.