Input: Article: In September 1828 Chopin, while still a student, visited Berlin with a family friend, zoologist Feliks Jarocki, enjoying operas directed by Gaspare Spontini and attending concerts by Carl Friedrich Zelter, Felix Mendelssohn and other celebrities. On an 1829 return trip to Berlin, he was a guest of Prince Antoni Radziwi, governor of the Grand Duchy of Posenhimself an accomplished composer and aspiring cellist. For the prince and his pianist daughter Wanda, he composed his Introduction and Polonaise brillante in C major for cello and piano, Op. 3.

Now answer this question: What year did Chopin return to Berlin?

Output: 1829

Input: Article: Oakland County in Metro Detroit, once rated amongst the wealthiest US counties per household, is no longer shown in the top 25 listing of Forbes magazine. But internal county statistical methods based on measuring per capita income for counties with more than one million residents show that Oakland is still within the top 12, slipping from the 4th-most affluent such county in the U.S. in 2004 to 11th-most affluent in 2009. Detroit dominates Wayne County, which has an average household income of about $38,000, compared to Oakland County's $62,000.

Now answer this question: What is Oakland Counties average income?

Output: $62,000

Input: Article: Though the true dimensions of species diversity remain uncertain, estimates range from 2.67.8 million species with a mean of 5.5 million. This probably represents less than 20% of all species on Earth[citation needed], and with only about 20,000 new species of all organisms being described each year, most species likely will remain undescribed for many years unless species descriptions increase in rate. About 850,0001,000,000 of all described species are insects. Of the 24 orders of insects, four dominate in terms of numbers of described species, with at least 3 million species included in Coleoptera, Diptera, Hymenoptera and Lepidoptera. A recent study estimated the number of beetles at 0.92.1 million with a mean of 1.5 million.

Now answer this question: How many insect species are estimated to exist?

Output:
2.67.8 million species