Question: Who is Sophie Of France (1786-1787)'s maternal grandfather?

Knowledge 1: Sophie of France (1786-1787)
Sophie Helena Beatrice of France ("Sophie Hélène Béatrix", 9 July 1786 – 19 June 1787) was a French princess, the second daughter and last child of Louis XVI of France and Marie Antoinette.She was styled as "Madame Sophie" at birth.As the daughter of a King of France, she was a "Fille de France". [SEP] Knowledge 2: Marie Antoinette
Marie Antoinette (born Maria Antonia Josepha Johanna; 2 November 1755 – 16 October 1793) was the last Queen of France before the French Revolution.She was born an Archduchess of Austria and was the penultimate child and youngest daughter of Empress Maria Theresa and Francis I, Holy Roman Emperor.She became Dauphine of France in May 1770 at age 14 upon her marriage to Louis-Auguste, heir apparent to the French throne.On 10 May 1774, her husband ascended the throne as Louis XVIand she assumed the title Queen of France and Navarre, which she held until September 1791, when she became Queen of the French as the French Revolution proceeded, a title that she held until 21 September 1792.After eight years of marriage, Marie Antoinette gave birth to Marie Thérèse, the first of her four children.A growing percentage of the population came to dislike her, accusing her of being profligate and promiscuous and of harboring sympathies for France's enemies, particularly her native Austria.The Affair of the Diamond Necklace damaged her reputation further.During the Revolution, she became known as Madame Déficit because the country's financial crisis was blamed on her lavish spending and her opposition to the social and financial reforms of Turgot and Necker.Several events were linked to Marie Antoinette during the Revolution after the government had placed the royal family under house arrest in the Tuileries Palace in October 1789.The June 1791 attempted flight to Varennes and her role in the War of the First Coalition had disastrous effects on French popular opinion.On 10 August 1792, the attack on the Tuileries forced the royal family to take refuge at the Assembly, and they were imprisoned in the Temple Prison on 13 August.On 21 September 1792, the monarchy was abolished.Louis XVI was executed on 21 January 1793.Marie Antoinette's trial began on 14 October 1793, and two days later she was convicted by the Revolutionary Tribunal of high treason and executed by guillotine on the Place de la Révolution.
Knowledge 1: Marie Antoinette
Marie Antoinette (born Maria Antonia Josepha Johanna; 2 November 1755 – 16 October 1793) was the last Queen of France before the French Revolution.She was born an Archduchess of Austria and was the penultimate child and youngest daughter of Empress Maria Theresa and Francis I, Holy Roman Emperor.She became Dauphine of France in May 1770 at age 14 upon her marriage to Louis-Auguste, heir apparent to the French throne.On 10 May 1774, her husband ascended the throne as Louis XVIand she assumed the title Queen of France and Navarre, which she held until September 1791, when she became Queen of the French as the French Revolution proceeded, a title that she held until 21 September 1792.After eight years of marriage, Marie Antoinette gave birth to Marie Thérèse, the first of her four children.A growing percentage of the population came to dislike her, accusing her of being profligate and promiscuous and of harboring sympathies for France's enemies, particularly her native Austria.The Affair of the Diamond Necklace damaged her reputation further.During the Revolution, she became known as Madame Déficit because the country's financial crisis was blamed on her lavish spending and her opposition to the social and financial reforms of Turgot and Necker.Several events were linked to Marie Antoinette during the Revolution after the government had placed the royal family under house arrest in the Tuileries Palace in October 1789.The June 1791 attempted flight to Varennes and her role in the War of the First Coalition had disastrous effects on French popular opinion.On 10 August 1792, the attack on the Tuileries forced the royal family to take refuge at the Assembly, and they were imprisoned in the Temple Prison on 13 August.On 21 September 1792, the monarchy was abolished.Louis XVI was executed on 21 January 1793.Marie Antoinette's trial began on 14 October 1793, and two days later she was convicted by the Revolutionary Tribunal of high treason and executed by guillotine on the Place de la Révolution. [SEP] Knowledge 2: Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.He was the grandfather of Emperor Yōzei.
Knowledge 1: Sophie of France (1786-1787)
Sophie Helena Beatrice of France ("Sophie Hélène Béatrix", 9 July 1786 – 19 June 1787) was a French princess, the second daughter and last child of Louis XVI of France and Marie Antoinette.She was styled as "Madame Sophie" at birth.As the daughter of a King of France, she was a "Fille de France". [SEP] Knowledge 2: Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.He was the grandfather of Emperor Yōzei.

Answer: Francis I, Holy Roman Emperor