“…KeyGraph which is the most widely used data mining algorithm is originally a graph-based keyword extraction algorithm [1] and is gradually used to analyze a variety of data and find rare or novel events in chance discovery. It has achieved successful outcomes in detecting earthquake risks [2], discovering emerging topics from the WWW [3], analyzing financial trends [4,5], seeking new hit products [6], and triggering creative ideas [7,8,9,10,11,12,13].…”