Question: Rebecca Akufo-Addo is the current First Lady of Ghana and gets her title by being what relationship to the president?

Context paragraphs:
First Lady of Austria: The First Lady of Austria is the title attributed to the wife (or, in place of a wife, a designee, such as a daughter) of the President of Austria.  The current First Lady is Doris Schmidauer, wife of President Alexander Van der Bellen, who has held the position since 26 January 2017.

First Ladies and Gentlemen of Kyrgyzstan: The First Lady or First Gentleman of Kyrgyzstan is the title attributed to the spouse of the President of Kyrgyzstan.  The current First Lady of Kyrgyzstan is Raisa Atambayeva, wife of President Almazbek Atambayev.

First Lady of Azerbaijan: The First Lady of Azerbaijan (Azerbaijani: "Azərbaycanın birinci xanımı" ) is the informal title of the wife of the President of Azerbaijan.  The current First Lady is Mehriban Aliyeva, wife of President Ilham Aliyev, who has held the position since 31 October 2003.  To date, there have been no First Gentlemen of Azerbaijan.

Rebecca Akufo-Addo: Rebecca Akufo-Addo ("née" Griffiths-Randolph) is a Ghanaian public figure and the First Lady of Ghana.

First Lady of Tijuana: First Lady of Tijuana is the honorary title of the spouse of the Municipal president of Tijuana.  This title is not official, but its use is more common and widespread in the media.  Spouses of Municipal Presidents officially bear the title of President of the Municipal DIF Sponsorship.  The current First Lady is Alicia Llanos de Ramos.

First Lady of the United States: First Lady of the United States (FLOTUS) is the informal but accepted title held by the wife of the President of the United States, concurrent with the president's term of office.  Although the first lady’s role has never been codified or officially defined, she figures prominently in the political and social life of the nation.  Melania Trump is the current First Lady.

First Lady of Ghana: The First Lady of Ghana is the title of the wife of a sitting President of Ghana.  The current First Lady is Rebecca Akufo-Addo.

First Lady of Puerto Rico: First Lady of Puerto Rico is the title given by the government of Puerto Rico to the spouse of the Governor of Puerto Rico or the daughters of the Governor should the Governor be a lady, single, divorced, or a widow.  The First Lady leads the Office of the First Lady of Puerto Rico and is expected to represent the women of Puerto Rico in elegance and demeanor.  The current First Lady is Beatriz Areizaga, wife of Ricardo Rosselló.

First Lady of Dubai: First Lady of Dubai (Arabic: سيدة الأولى في دبي‎ ‎ ) is the title given to the senior wife and consort to the Ruler of Dubai.  The First Lady is the Chief Matriarch and is expected to represent Dubai in elegance and demeanor.  The current First Lady is Sheikha Hind, wife of Sheikh Mohammed bin Rashid Al Maktoum.

President of Ghana: The President of the Republic of Ghana is the elected head of state and head of government of Ghana, as well as Commander-in-Chief of the Ghana Armed Forces.  The current President of Ghana is Nana Akufo-Addo, who won the 2016 presidential election against the incumbent, John Dramani Mahama, by a margin of 9.45%.  Akufo-Addo was sworn into office on 7 January 2017.

Supporting paragraphs: Rebecca Akufo-Addo First Lady of Ghana
Answer: wife