Fig. 6From: Semi-supervised learning for detecting human traffickingFrequency of each feature in \({\mathcal {F}}_1\) in the filtered dataset. Features are grouped into the two groups, most important (\({\mathcal {F}}^*_1\)) and less important features (\(\overline{{\mathcal {F}}^*_1}\)), according to \(\chi ^2\) Back to article page