According to an example, NPS determination may include: receiving data from an internal data source and/or an external data source; determining a sentiment orientation of comments; scoring the sentiment orientation of the comments; classifying the comments that are above and below predetermined thresholds based on the scoring respectively as promoters and detractors for a training data set; utilizing hyper planes generated from the training data set to classify comments in another set of the data as promoters and detractors; and utilizing the classified comments from the training data set and the another set of the data to determine the NPS.
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