We now describe the two baselines that are relevant for our work. Baseline 1: <cite>Mitra et al. [19]</cite> <cite>The authors proposed</cite> an unsupervised method to identify word sense changes automatically for nouns. Datasets and graph construction: <cite>The authors used</cite> the Google books corpus, consisting of texts from over 3.4 million digitized English books published between 1520 and 2008. <cite>The authors constructed</cite> distributional thesauri (DT) networks from the Google books syntactic n-grams data [9] .