premise: A bird is perched on a line of some sort attached to a pole.
hypothesis: A bird is standing on a pole line.
explanation_1: Perched is another way of saying standing.  The bird is on a line attached to a pole.
explanation_2: Bird is perched is a paraphrase of bird is standing, and pole line is a line of some sort.
explanation_3: If the line is attached to the pole, it is a pole line.
premise_logic: exists e2 e1 x1 x2 x3 x4 x5.(on(e1,x2) & of(x2,x3) & to(e2,x5) & n_pole(x5) & Theme(e2,x4) & v_attach(e2) & (x3 = x4) & n_sort(x3) & n_line(x2) & Theme(e1,x1) & v_perch(e1) & n_bird(x1))
hypothesis_logic: exists e1 x1 x2 x3.(on(e1,x2) & n_line(x2) & of(x2,x3) & n_pole(x3) & Actor(e1,x1) & v_stand(e1) & n_bird(x1))
premise_sim: exists e2 e1 x1 x2 x3 x4 x5.(v_perch(e1) & v_attach(e2) & to(e2,x5) & on(e1,x2) & of(x2,x3) & n_sort(x3) & n_pole(x5) & n_line(x2) & n_bird(x1) & Theme(e2,x4) & Theme(e1,x1) & (x3 = x4))
hypothesis_sim: exists e1 x1 x2 x3.(v_stand(e1) & on(e1,x2) & of(x2,x3) & n_pole(x3) & n_line(x2) & n_bird(x1) & Actor(e1,x1))