question:
The Greater Mexico City has a gross domestic product (GDP) of US$411 billion in 2011, making Mexico City urban agglomeration one of the economically largest metropolitan areas in the world.
How big is Mexico City's GDP?

answer: yes

question:
The music of Haydn and Mozart, with their Viennese Classical styles, are usually regarded as being the most in line with the Enlightenment ideals.
What style of music did Haydn and Mozart share?

answer: yes

question:
The city has played a major role in the development and support of American rock music and rap music.
What is the name of the stadium that held Live Aid?

answer: no

question:
On August 19 Filner and city representatives entered a mediation process, as a result of which Filner agreed to resign, effective August 30, 2013, while the city agreed to limit his legal and financial exposure.
When did a mediation process begin between Filner and a city representative?

answer:
yes