Input: Article: On April 19, the BBC reported that 1,300 people had gathered outside BBC buildings in Manchester and London, protesting against what they described as Western media bias. Several days earlier, the BBC had published an article entitled "The challenges of reporting in China", responding to earlier criticism. The BBC's Paul Danahar noted that Chinese people were now "able to access the BBC News website for the first time, after years of strict censorship", and that "many were critical of our coverage". He provided readers with a reminder of censorship in China, and added: "People who criticise the media for their coverage in Tibet should acknowledge that we were and still are banned from reporting there." He also quoted critical Chinese responses, and invited readers to comment.

Now answer this question: What article did BBC put out about China just days earlier?

Output: The challenges of reporting in China

Input: Article: Efforts by local kings to fight the invaders led to the formation of new political entities. In Anglo-Saxon England, King Alfred the Great (r. 871899) came to an agreement with the Viking invaders in the late 9th century, resulting in Danish settlements in Northumbria, Mercia, and parts of East Anglia. By the middle of the 10th century, Alfred's successors had conquered Northumbria, and restored English control over most of the southern part of Great Britain. In northern Britain, Kenneth MacAlpin (d. c. 860) united the Picts and the Scots into the Kingdom of Alba. In the early 10th century, the Ottonian dynasty had established itself in Germany, and was engaged in driving back the Magyars. Its efforts culminated in the coronation in 962 of Otto I (r. 936973) as Holy Roman Emperor. In 972, he secured recognition of his title by the Byzantine Empire, which he sealed with the marriage of his son Otto II (r. 967983) to Theophanu (d. 991), daughter of an earlier Byzantine Emperor Romanos II (r. 959963). By the late 10th century Italy had been drawn into the Ottonian sphere after a period of instability; Otto III (r. 9961002) spent much of his later reign in the kingdom. The western Frankish kingdom was more fragmented, and although kings remained nominally in charge, much of the political power devolved to the local lords.

Now answer this question: What group did Otto I defeat?

Output: Magyars

Input: Article: Bell is also credited with developing one of the early versions of a metal detector in 1881. The device was quickly put together in an attempt to find the bullet in the body of U.S. President James Garfield. According to some accounts, the metal detector worked flawlessly in tests but did not find the assassin's bullet partly because the metal bed frame on which the President was lying disturbed the instrument, resulting in static. The president's surgeons, who were skeptical of the device, ignored Bell's requests to move the president to a bed not fitted with metal springs. Alternatively, although Bell had detected a slight sound on his first test, the bullet may have been lodged too deeply to be detected by the crude apparatus.

Now answer this question: What did Bell think was wrong with the bed, which prevented his machine from finding the bullet?

Output:
metal bed frame