Query-Focused Opinion Summarization for User-Generated Content
Table 3: [Left] Summaries evaluated by Jensen-Shannon divergence (JSD) on Yahoo Answer for summaries of 100 words and 200 words. The average length of the best answer is 102.70. [Right] Value addition of each component in the objective function. The JSD on each line is statistically significantly lower than the JSD on the previous (α=0.05).
['[EMPTY]', '[BOLD] JSD100', '[BOLD] JSD200']
The topic number is tuned on the development set, and we find that varying the number of topics does not impact performance too much. Meanwhile, both our system and \newcitedasgupta-kumar-ravi:2013:ACL2013 produce better JSD scores than the two variants of the \newciteLin:2011:CSF:2002472.2002537 system, which implies the effectiveness of the dispersion function.