Problem: Besides being the political center, Brasilia is an important economic center. Brasilia has the highest city gross domestic product (GDP) of 99.5 billion reais representing 3.76% of the total Brazilian GDP. The main economic activity of the federal capital results from its administrative function. Its industrial planning is studied carefully by the Government of the Federal District. Being a city registered by UNESCO, the government in Brasilia has opted to encourage the development of non-polluting industries such as software, film, video, and gemology among others, with emphasis on environmental preservation and maintaining ecological balance, preserving the city property.
What is Brasilia's GDP?
The answer is the following: 99.5 billion reais

Problem: The earliest evidence of the presence of human ancestors in the southern Balkans, dated to 270,000 BC, is to be found in the Petralona cave, in the Greek province of Macedonia. All three stages of the stone age (Paleolithic, Mesolithic, and Neolithic) are represented in Greece, for example in the Franchthi Cave. Neolithic settlements in Greece, dating from the 7th millennium BC, are the oldest in Europe by several centuries, as Greece lies on the route via which farming spread from the Near East to Europe.
Greece has evidence of Stone Age people during what time period?
The answer is the following: 7th millennium BC

Problem: Detroit has a Mexican-American population. In the early 20th century thousands of Mexicans came to Detroit to work in agricultural, automotive, and steel jobs. During the Mexican Repatriation of the 1930s many Mexicans in Detroit were willingly repatriated or forced to repatriate. By the 1940s the Mexican community began to settle what is now Mexicantown. The population significantly increased in the 1990s due to immigration from Jalisco. In 2010 Detroit had 48,679 Hispanics, including 36,452 Mexicans. The number of Hispanics was a 70% increase from the number in 1990.
When did Mexicantown start to grow?
The answer is the following: 1940s

Problem: Comandante general Simon Elias Gonzalez, was nominated governor and military command was given to Colonel J.J. Calvo, whose firmness had earned well-merited praise. The state was in the midst of a war with the Apaches, which became the focus of all their energy and resources. After a review of the situation, Simon Elias Gonzalez declared that the interests of the territory would be best served by uniting the civil and military power, at least while the campaign lasted. He resigned under opposition, but was renominated in 1837.
Military command was given to whom based on his firmness?
The answer is the following:
Colonel J.J. Calvo