The production of knowledge bases and the need to answer questions over such resources received researchers attentions to propose different models to find the answer of questions from the knowledge bases, known as KBQA 1 . Answering factoid questions with one relation, also known as simple question answering, has been widely studied in recent years (Dai et al., 2016; Yin et al., 2016; He and Golub, 2016;<cite> Yu et al., 2017)</cite> .