use this paper: Liu, C., & Lu, X. (2018). Analyzing hidden populations online: t

use this paper:
Liu, C., & Lu, X. (2018). Analyzing hidden populations online: topic, emotion, and social network of HIV-related users in the largest Chinese online community. BMC Medical Informatics and Decision Making, 18(1). https://doi.org/10.1186/s12911-017-0579-1
I expect you to describe how they used the text mining and visualization in the assessment. Also, highlight the tools/technologies used for the textual mining in the discussion.

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