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Clustering reviews into three categories

Hello everybody, I have a quick question, I have a reviews (they are all stored inside one attribute) I need to split them into 3 categories( so I assume clustering?) into like positive, neutral and negative reviews,everything I tried ( with different k-means clustering, different parameters ) I cant get the right results, can anyone help what am I missing? Im not that good so I must be missing something, my process is in the pictures, thanks a lot for a reply

Image: https://us.v-cdn.net/6030995/uploads/editor/9g/j4k10v24k2hz.png

Image: https://us.v-cdn.net/6030995/uploads/editor/75/4tmvdkx35n01.png

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k-Means Clustering

Text Mining + NLP

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