To extract opinion targets, many studies regarded opinion words as strong indicators Popescu et al., 2005;Liu et al., 2005;Qiu et al., 2011;Zhang et al., 2010), which is based on the observation that opinion words are usually located around opinion targets, and there are associations between them.
most pervious methods iteratively extracted opinion targets depending upon the associations between opinion words and opinion targets (Qiu et al., 2011;Zhang et al., 2010).