A dog takes off running on the sand.
The dog is eating a bone at home.
A running dog isn't engaged in eating. Sand is a different location than home.
exists e2 e1 s1 x1 x2.(n_sand(x2) & for(e1,e2) & on(e2,x2) & Actor(e2,x1) & v_run(e2) & a_off(s1) & Manner(e1,s1) & Actor(e1,x1) & v_take(e1) & n_dog(x1))
exists e1 x1 x2 x3.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & at(x2,x3) & n_home(x3) & n_bone(x2))