When the given documents are all supposed to be about the same topic, they are very likely to repeat some important information in different documents or in different places of the same document.
the former document set contains 10 documents about 'Labor Dispute in National Basketball Association', while the latter one contains 25 documents about 'Art and music in public schools' and the corresponding query is to 'Describe the state of teaching art and music in public schools around the word, indicate problems, progress and failures'.