premise: The small girl is sitting in a harness, strapped to a tether, while others watch.
hypothesis: A little girl is riding a bicycle on a tightrope.
explanation_1: The girl is either sitting or riding.  She is either in a harness or on a bicycle because a bicycle does not have a harness.  She cannot be strapped to something while also on a tightrope.
explanation_2: A girl is sitting in a harness or riding a bicycle. Both functions are not possible.
explanation_3: the small girl can not sitting and riding at the same time.
premise_logic: exists e1 p1 s1 s2 x1 x2 x3 x4.(n_person(x1) & n_girl(x1) & a_small(s1) & Theme(s1,x1) & exists e2 x5.(Actor(e2,x5) & v_watch(e2) & -(x5 = x1) & n_person(x5)) & while(e1,p1) & in(e1,x2) & to(s2,x4) & n_tether(x4) & Theme(s2,x3) & a_strap(s2) & (x2 = x3) & n_harness(x2) & Actor(e1,x1) & v_sit(e1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(on(e1,x3) & n_tightrope(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
premise_sim: exists e1 p1 s1 s2 x1 x2 x3 x4.(while(e1,p1) & v_sit(e1) & to(s2,x4) & n_tether(x4) & n_person(x1) & n_harness(x2) & n_girl(x1) & in(e1,x2) & exists e2 x5.(v_watch(e2) & n_person(x5) & Actor(e2,x5) & -(x5 = x1)) & a_strap(s2) & a_small(s1) & Theme(s2,x3) & Theme(s1,x1) & Actor(e1,x1) & (x2 = x3))
hypothesis_sim: exists e1 s1 x1 x2 x3.(v_ride(e1) & on(e1,x3) & n_tightrope(x3) & n_girl(x1) & n_bicycle(x2) & a_little(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1))