Question: Who is the sibling-in-law of Giuditta Grisi?

Knowledge 1: Giuditta Grisi
Giuditta Grisi (28 July 1805 – 1 May 1840) was an Italian operatic mezzo-soprano, sister of soprano Giulia Grisi and cousin of ballerina Carlotta Grisi.She was born and studied in Milan, and made her debut in Vienna, as Faliero in "Bianca e Faliero", in 1826.She specialized in Rossini roles, which from 1827, she sang throughout Italy, also creating several roles in opera by composers such as Persiani, Coccia, Pacini, etc.Bellini wrote the role of Romeo in "I Capuleti e i Montecchi" for her in 1830.She appeared in London, and at the Théâtre-Italien in Paris, singing Romeo, "La stranieraLa donna del lago", etc.Superbly gifted, she suffered early from serious vocal problems, which necessitated considerable transposition and rewriting of the vocal line.She died prematurely aged only 34, at Lodi, Lombardy. [SEP] Knowledge 2: Giulia Grisi
Giulia Grisi (22 May 1811 – 29 November 1869) was an Italian opera singer.She performed widely in Europe, the United States and South America and is widely considered to be one of the leading sopranos of the 19th century.Her second husband was Giovanni Matteo Mario de Candia (also known as "Mario the Tenor"), scion of a noble family of the Kingdom of Sardinia.She is buried at Père Lachaise Cemetery in Paris.Her grave is marked "Juliette de Candia", styled in her married last name.
Knowledge 1: Giuditta Grisi
Giuditta Grisi (28 July 1805 – 1 May 1840) was an Italian operatic mezzo-soprano, sister of soprano Giulia Grisi and cousin of ballerina Carlotta Grisi.She was born and studied in Milan, and made her debut in Vienna, as Faliero in "Bianca e Faliero", in 1826.She specialized in Rossini roles, which from 1827, she sang throughout Italy, also creating several roles in opera by composers such as Persiani, Coccia, Pacini, etc.Bellini wrote the role of Romeo in "I Capuleti e i Montecchi" for her in 1830.She appeared in London, and at the Théâtre-Italien in Paris, singing Romeo, "La stranieraLa donna del lago", etc.Superbly gifted, she suffered early from serious vocal problems, which necessitated considerable transposition and rewriting of the vocal line.She died prematurely aged only 34, at Lodi, Lombardy. [SEP] Knowledge 2: Robert Vadra
Robert Vadra is an Indian businessman, entrepreneur and the husband of Priyanka Gandhi.He is the son -in- law of Sonia Gandhi and Rajiv Gandhi, and the brother- in- law of Rahul Gandhi.
Knowledge 1: Giuditta Grisi
Giuditta Grisi (28 July 1805 – 1 May 1840) was an Italian operatic mezzo-soprano, sister of soprano Giulia Grisi and cousin of ballerina Carlotta Grisi.She was born and studied in Milan, and made her debut in Vienna, as Faliero in "Bianca e Faliero", in 1826.She specialized in Rossini roles, which from 1827, she sang throughout Italy, also creating several roles in opera by composers such as Persiani, Coccia, Pacini, etc.Bellini wrote the role of Romeo in "I Capuleti e i Montecchi" for her in 1830.She appeared in London, and at the Théâtre-Italien in Paris, singing Romeo, "La stranieraLa donna del lago", etc.Superbly gifted, she suffered early from serious vocal problems, which necessitated considerable transposition and rewriting of the vocal line.She died prematurely aged only 34, at Lodi, Lombardy. [SEP] Knowledge 2: Charles Francis Norton
Charles Francis Norton( 1807 – 1835) was a 19th- century Member of Parliament for Guildford.Norton was also a Captain of 52nd Light Infantry; son-in- law of Sir Colin Campbell; brother- in- law of writer Caroline Norton

Answer: Giovanni Matteo Mario