Question: What does the data cleaning and filtering process consist of?
Answer: many news articles begin with reporter names, media agencies, dates or other contents irrelevant to the content, to ensure that the summary is concise and the article contains enough salient information, we only keep articles with 10-150 words in the top three sentences and 150-1200 words in the rest, and that contain at least 6 sentences in total, we try to remove articles whose top three sentences may not form a relevant summary