Finding required information on any particular topic give rise information retrieval (IR) problems. Information retrieval techniques resolved these issues but these techniques are unable to extract opinions from unstructured text.Hence, for this problem opinion mining techniques are utilized. Opinion mining extracts opinions from unstructured data source efficiently but it extracts opinions with polarity either negative or positive. The single topic or product where one opinion is similar to another, opinion mining is unable to detect semantic similarity between opinions which are semantically similar. There are other tools available too (Turnitin, Viper, PlagScan) for retrieving the text or documents on [...]
