In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Example Input: Why could there be reasonable doubt about the validity of what was stated that she said?, Context: In May 2007, The Daily Telegraph, citing unnamed sources, reported that the Queen was "exasperated and frustrated" by the policies of the British Prime Minister, Tony Blair, that she was concerned the British Armed Forces were overstretched in Iraq and Afghanistan, and that she had raised concerns over rural and countryside issues with Blair. She was, however, said to admire Blair's efforts to achieve peace in Northern Ireland. On 20 March 2008, at the Church of Ireland St Patrick's Cathedral, Armagh, the Queen attended the first Maundy service held outside England and Wales. At the invitation of the Irish President, Mary McAleese, the Queen made the first state visit to the Republic of Ireland by a British monarch in May 2011.
Example Output: unnamed sources

Example Input: How bad were Nasser's heart attacks?, Context: Nasser had few personal vices other than chain smoking. He maintained 18-hour workdays and rarely took time off for vacations. The combination of smoking and working long hours contributed to his poor health. He was diagnosed with diabetes in the early 1960s and by the time of his death in 1970, he also had arteriosclerosis, heart disease, and high blood pressure. He suffered two major heart attacks (in 1966 and 1969), and was on bed rest for six weeks after the second episode. State media reported that Nasser's absence from the public view at that time was a result of influenza.
Example Output: major heart attacks

Example Input: What is the conversion into pounds for 1040.54 Swiss francs?, Context: As of 2003[update] the average price to rent an average apartment in Bern was 1108.92 Swiss francs (CHF) per month (US$890, £500, €710 approx. exchange rate from 2003). The average rate for a one-room apartment was 619.82 CHF (US$500, £280, €400), a two-room apartment was about 879.36 CHF (US$700, £400, €560), a three-room apartment was about 1040.54 CHF (US$830, £470, €670) and a six or more room apartment cost an average of 2094.80 CHF (US$1680, £940, €1340). The average apartment price in Bern was 99.4% of the national average of 1116 CHF. The vacancy rate for the municipality, in 2010[update], was 0.45%.
Example Output:
470