a boy runs through the grass.
A boy flees the angry dog.
a boy running through the grass, isn't necessarily fleeing an angry dog.
exists e1 x1 x2.(n_grass(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_boy(x1))
exists e1 s1 x1 x2.(n_dog(x2) & a_angry(s1) & Theme(s1,x2) & Theme(e1,x2) & Actor(e1,x1) & v_flee(e1) & n_boy(x1))