The animals do not look aggressive.
The animals appear docile.
The animals not looking aggressive implies that they're docile.
exists x1.(n_animal(x1) & -exists e1 p1.(exists s1.(Theme(s1,x1) & a_aggressive(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1)))
exists e1 x1 x2.(n_animal(x1) & Time(e1,x2) & n_docile(x2) & Actor(e1,x1) & v_appear(e1))