“…Meanwhile, some considered taxonomies of link prediction techniques (Martínez, Berzal, & Cubero, 2017), (Al Hasan & Zaki, 2011) introduces four groups of approaches including similarity, statistical, algorithmic, and preprocessing approaches which can be applied to different networks including simple, social and complex ones. Most of the studies on the link prediction literature mainly focus on the unsigned networks like Facebook and MySpace; some research including (Gu, Chen, Li, Liu, & Chen, 2019) and (Yuan, He, Guan, Zhou, & Li, 2019) study the link prediction approach in signed networks. A detailed and comprehensive study of the state-of-the-art of link prediction approaches and a study on the computational complexity analysis of most important techniques are provided in (Martínez, Berzal, & Cubero, 2017).…”