information extraction
opinionanalysis,Recommendersystemsareeffectiveinpredictingthemostsuitableproductsforusers,suchasmoviesandbooks.Tofacilitatepersonalizedrecommendations,thequalityofitemratingsshouldbeguaranteed.However,afewratingsmightnotbeaccurateenoughduetotheuncertaintyofuserbehaviorandarereferredto