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  1. Oct 2017
    1. We deleted non-directed tweets, but itshould be acknowledged that non-directed tweets may also bear implications for knowledgesharing and can be examined in future studies. The data cleaning procedure also excludedretweets and tweets that serve as quoting.

      This is a detailed description of their data cleaning methodology. It is good to know to help understand the results of this research study, but is also helpful for me to understand how to clean such large data sets.