A harnessed dog leaps over a log as another dog follows behind.
The dog is walking.
A dog leaps over a log can not be walking.
exists e1 p1 s1 x1 x2.(exists e2 s2 x3.(a_behind(s2) & Manner(e2,s2) & Actor(e2,x3) & v_follow(e2) & n_dog(x3) & -(x3 = x1)) & n_dog(x1) & n_dog(x1) & as(e1,p1) & over(e1,x2) & n_log(x2) & Actor(e1,x1) & v_leap(e1) & a_harnessed(s1) & Theme(s1,x1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_walk(e1))