... Segments A B a C b D c d Sentences Figure 1: Arranging four sentences A, B, C, and D with a bottom-up approach task for computers However, the bottom-up algorithm for arranging sentences can still ... (2002), which groups sentences referring to the same topic To measure the topical closeness of two sentences, we represent each sentence with a vector whose elements correspond to the occurrence1 ... sentences a and b, which is calculated by the cosine similarity of two vectors corresponding to the sentences For sentence b ∈ B, maxa∈A sim(a, b) chooses the sentence a ∈ A most similar to sentence...