instruction:
In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
question:
What did the land bridge between the Americas cause to change?, Context: South America became linked to North America through the Isthmus of Panama during the Pliocene, bringing a nearly complete end to South America's distinctive marsupial faunas. The formation of the Isthmus had major consequences on global temperatures, since warm equatorial ocean currents were cut off and an Atlantic cooling cycle began, with cold Arctic and Antarctic waters dropping temperatures in the now-isolated Atlantic Ocean. Africa's collision with Europe formed the Mediterranean Sea, cutting off the remnants of the Tethys Ocean. Sea level changes exposed the land-bridge between Alaska and Asia. Near the end of the Pliocene, about 2.58 million years ago (the start of the Quaternary Period), the current ice age began. The polar regions have since undergone repeated cycles of glaciation and thaw, repeating every 40,000100,000 years.
answer:
global temperatures

question:
What event caused a potential change in presidental leadership, Context: The House of Representatives currently has 59 members elected for a five-year term, 56 members by proportional representation and 3 observer members representing the Armenian, Latin and Maronite minorities. 24 seats are allocated to the Turkish community but remain vacant since 1964. The political environment is dominated by the communist AKEL, the liberal conservative Democratic Rally, the centrist Democratic Party, the social-democratic EDEK and the centrist EURO.KO. In 2008, Dimitris Christofias became the country's first Communist head of state. Due to his involvement in the 201213 Cypriot financial crisis, Christofias did not run for re-election in 2013. The Presidential election in 2013 resulted in Democratic Rally candidate Nicos Anastasiades winning 57.48% of the vote. As a result, Anastasiades was sworn in on and has been President since 28 February 2013.
answer:
the 201213 Cypriot financial crisis

question:
The British helped the?, Context: The Germans developed massive reinforced concrete blockhouses, some more than six stories high, which were known as Hochbunker "High Bunkers" or "Flakturme" flak towers, on which they placed anti-aircraft artillery. Those in cities attacked by the Allied land forces became fortresses. Several in Berlin were some of the last buildings to fall to the Soviets during the Battle of Berlin in 1945. The British built structures such as the Maunsell Forts in the North Sea, the Thames Estuary and other tidal areas upon which they based guns. After the war most were left to rot. Some were outside territorial waters, and had a second life in the 1960s as platforms for pirate radio stations.
answer:
Allied land forces