Task: Explanation
Input (English): Slade are an English glam rock band from Wolverhampton. They rose to prominence during the early 1970s with 17 consecutive top 20 hits and six number ones on the UK Singles Chart. The "British Hit Singles & Albums" names them as the most successful British group of the 1970s based on sales of singles. They were the first act to have three singles enter the charts at number one; all six of the band's chart-toppers were penned by Noddy Holder and Jim Lea. As of 2006, total UK sales stand at 6,520,171, and their best-selling single, "Merry Xmas Everybody", has sold in excess of one million copies. Question: How many copies were sold of the last UK number-one single that was written by Noddy Holder and Jim Lea? Answer: in excess of one million copies
Output (English):  They were the first act to have three singles enter the charts at number one; all six of the bands charttoppers were penned by Noddy Holder and Jim Lea.