a lady is talking with a little boy both standing on stairs
A lady and a little boy walk through a park.
A lady and boy can not be on stairs and walking in a park at the same time.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_stair(x4) & n_standing(x3) & Time(e1,x3) & n_both(x3) & with(e1,x2) & n_boy(x2) & a_little(s1) & Theme(s1,x2) & Actor(e1,x1) & v_talk(e1) & n_lady(x1))
exists s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & through(x2,x4) & n_park(x4) & n_walk(x2) & of(x2,x3) & n_boy(x3) & a_little(s2) & Theme(s2,x2) & subset_of(x1,s1) & n_lady(x1))