 In this paper, we propose a novel cause-effect look at the language bias , where the bias is formulated as the direct  effect of question on answer from the view of causal inference.
<clarity>  In this paper, we propose a novel cause-effect look at the language bias , where the bias is formulated as the direct  effect of question on answer from the view of causal inference.
 In this paper, we propose a novel cause-effect look at the language bias as the direct effect of question on answer from the view of causal inference.