A man trains an attack dog.
The man sits alone in an empty field.
If the man trains a dog, he cannot be sitting alone.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_train(e1) & n_dog(x2) & of(x2,x3) & n_attack(x3) & n_man(x1))
exists e1 s1 s2 x1 x2.(n_man(x1) & in(e1,x2) & n_field(x2) & a_empty(s2) & Theme(s2,x2) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))