Input: Article: Environmental damage in Thuringia has been reduced to a large extent after 1990. The condition of forests, rivers and air was improved by modernizing factories, houses (decline of coal heating) and cars, and contaminated areas such as the former Uranium surface mines around Ronneburg have been remediated. Today's environmental problems are the salination of the Werra river, caused by discharges of K+S salt mines around Unterbreizbach and overfertilisation in agriculture, damaging the soil and small rivers.

Now answer this question: What are today's big environmental problems?

Output: the salination of the Werra river

Input: Article: Beginning and ending dates are roughly the reverse in the southern hemisphere. For example, mainland Chile observed DST from the second Saturday in October to the second Saturday in March, with transitions at 24:00 local time. The time difference between the United Kingdom and mainland Chile could therefore be five hours during the Northern summer, three hours during the Southern summer and four hours a few weeks per year because of mismatch of changing dates.

Now answer this question: In the Northern hemisphere's summer, what is the time difference between the UK and Chile?

Output: five hours

Input: Article: The Russian Soviet Federative Socialist Republic (Russian SFSR or RSFSR; Russian: , tr. Rossiyskaya Sovetskaya Federativnaya Sotsialisticheskaya Respublika listen (helpinfo)) commonly referred to as Soviet Russia or simply as Russia, was a sovereign state in 191722, the largest, most populous, and most economically developed republic of the Soviet Union in 192291 and a sovereign part of the Soviet Union with its own legislation in 199091. The Republic comprised sixteen autonomous republics, five autonomous oblasts, ten autonomous okrugs, six krais, and forty oblasts. Russians formed the largest ethnic group. To the west it bordered Finland, Norway and Poland; and to the south, China, Mongolia and North Korea whilst bordering the Arctic Ocean to the north, the Pacific Ocean to the east and the Black sea and Caspian Sea to the south. Within the USSR, it bordered the Baltic republics (Lithuania, Latvia and Estonia), the Byelorussian SSR and the Ukrainian SSR to the west. To the south it bordered the Georgian, Azerbaijan and Kazakh SSRs.

Now answer this question: How many krais were present in the RSFSR?

Output:
six