user: What are some of the reasons people like to visit Brazil?

assistant: Brazil is a South American country with a diverse landscape and cultural mix. From subtropical grasslands in the South to drier biomes in the northeast to the Amazon rainforest, many people visit the country to experience one of the world's biodiverse hotspots. Several species are endemic to Brazil, particularly in the Amazon region. The country is also known for a culture that blends European, African and Indigenous influences. Many visitors are intrigued by its diverse culture. The nation received many migrants from all over the world in the 19th and 20th centuries, leading to the largest Japanese community outside of Japan, largest Italian population outside of Italy, and the largest population of  SubSaharan African descent outside of Nigeria. Many of the cultural expressions of Brazil - capoeira, the large Carnaval parades, Brazilian soccer and jiu-jitsu - have found a devotees outside of the country.

user: What is a derivative in finance?

assistant: In finance, a derivative is a contract that derives its value from the performance of an underlying entity. This underlying entity can be an asset, index, or interest rate, and is often simply called the "underlying". Derivatives can be used for a number of purposes, including insuring against price movements (hedging), increasing exposure to price movements for speculation, or getting access to otherwise hard-to-trade assets or markets.

Some of the more common derivatives include forwards, futures, options, swaps, and variations of these such as synthetic collateralized debt obligations and credit default swaps. Most derivatives are traded over-the-counter (off-exchange) or on an exchange such as the Chicago Mercantile Exchange, while most insurance contracts have developed into a separate industry. In the United States, after the financial crisis of 2007–2009, there has been increased pressure to move derivatives to trade on exchanges.

Derivatives are one of the three main categories of financial instruments, the other two being equity (i.e., stocks or shares) and debt (i.e., bonds and mortgages).

user: Who is Ibrahima Tamba?

assistant: Ibrahima Tamba is an olympic sprinter from Senegal who participated in the 88 and 92 summer olympics