Buenos Aires ( or ; ) is the capital and most populous city of Argentina. The city is located on the western shore of the estuary of the Río de la Plata, on the South American continent's southeastern coast. "Buenos aires" can be translated as "fair winds" or "good airs", but the first one was the meaning intended by the founders in the 16th century, by the use of the original name "Real de Nuestra Señora Santa María del Buen Ayre". The Greater Buenos Aires conurbation, which also includes several Buenos Aires Province districts, constitutes the fourth-most populous metropolitan area in the Americas, with a population of around 17 million. 

The city of Buenos Aires is neither part of Buenos Aires Province nor the Province's capital; rather, it is an autonomous district. In 1880, after decades of political infighting, Buenos Aires was federalized and removed from Buenos Aires Province. The city limits were enlarged to include the towns of Belgrano and Flores; both are now neighborhoods of the city. The 1994 constitutional amendment granted the city autonomy, hence its formal name: Ciudad Autónoma de Buenos Aires (Autonomous City of Buenos Aires). Its citizens first elected a chief of government (i.e. mayor) in 1996; previously, the mayor was directly appointed by the President of the Republic.
What is the capital city of Argentina?
What is its meaning?
Does it have too many people?
What is the population?
What kind of a district is it?
Was it removed from its district?
Where is it ranked in terms of the metropolitan area in the Americas?
What amendment gave it its formal name?
And what is its formal name?
Which translates into English as what?
Who did its citizens first elect?
what year?
Before the mayor was elected by who otherwise?
Buenos Aires
Buenos Aires ( or ; ) is the capital and most populous city of Argentina
fair winds
Buenos aires" can be translated as "fair winds
yes
The city limits were enlarged
around 17 million.
with a population of around 17 million. 
autonomous
is an autonomous district
yes
 Buenos Aires was federalized and removed from Buenos Aires Province
the fourth-most populous
 the fourth-most populous metropolitan
The 1994 constitutional amendment
The 1994 constitutional amendment granted the city autonomy, hence its formal name
Ciudad Autónoma de Buenos Aires
hence its formal name: Ciudad Autónoma de Buenos Aires
Autonomous City of Buenos Aires
Ciudad Autónoma de Buenos Aires (Autonomous City of Buenos Aires)
a chief of government
Its citizens first elected a chief of government 
1996
elected a chief of government (i.e. mayor) in 1996
the President of the Republic
 previously, the mayor was directly appointed by the President of the Republic