The most prominent approaches include: (1) temporal ordering in terms of publication date (Barzilay, 2003) , (2) temporal ordering in terms of textual cues in sentences (Bollegala et al., 2006) , (3) the topic of the sentences (Barzilay, 2003) , (4) coherence theories (<cite>Barzilay and Lapata, 2008</cite>) , e.g., Centering Theory, (5) content models (Barzilay and Lee, 2004) , and (6) ordering(s) in the underlying documents in the case of summarisation (Bollegala et al., 2006; Barzilay, 2003) .