Alternative Approaches Having trained humans, e.g., professional abstractors, write multidocument summaries is expensive, and for laymen, the task is highly demanding and time-consuming.
a recent project on the construction of a MDS corpus for European Portuguese took a semi-automatic approach where the documents within a topic were first filtered for relevance using a summarization system and then processed by human annotators who only had to remove sentences until the summary length was reached (Almeida et al., 2014).