Application Semi-supervised Text Classification World Knowledge Specification Text and World Knowledge earning Graphs World Knowledge Representation Wang et al., KDD 15 Wang et al. ICDM 15 Wang et al TKDD'16 Wang et al., AAAl16Application: Semi-supervised Text Classification World Knowledge Specification World Knowledge Representation Learning Text and World Knowledge Graphs Wang et al., KDD’15 Wang et al., ICDM’15 Wang et al., TKDD’16 Wang et al., AAAI’16 21