Web Science/Part2: Emerging Web Properties/Modelling Similarity of Text/Comparing Results of Similarity Merasures/quiz

{which method can be used best to find characteristic words of a text? - jaccard + TF-IDF - TF - Language Model - Smoothed Language Model
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{Which method works well in an information retrieval setting} - jaccard + TF-IDF + Language Model + Smoothed Language Model

{Which method should be used when you don't have several occurences of the same elements?} + jaccard - TF-IDF - Language Model - Smoothed Language Model