Text Mining Course: Importing text

- Import data from: TripadvisorReviews-SanFranciscoRestaurants-ItalianChineseFood.table - Filter rows with missing titles - Convert strings to documents - Filter all columns except the column containing the documents

This is a companion discussion topic for the original entry at https://kni.me/w/vvXILX54f9YTkd7L

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