premise: Construction workers are standing upon on a wooden bridge.
hypothesis: The men are nervous
explanation_1: You can not infer they are nervous.
explanation_2: The act of standing on a wooden bridge does not have to make a worker nervous.
explanation_3: Standing upon a wooden bridge does not imply that they are nervous.
premise_logic: exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_bridge(x3) & a_wooden(s2) & Theme(s2,x3) & a_upon(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
hypothesis_logic: exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_nervous(s1))