*3.4. Lemmatization*

Lemmatization is a process that extracts core form of a word to a common base. The used approach banks on lemmatization phase to extract core form of a token or a word to achieve more accurate results in sentiment analysis phase [34]. It can drive linked forms of words to a mutual base. Many textual documents use dissimilar forms of a word, e.g., mobile, mobiles, mobile's are all attributed to 'mobile'.
