A brown dog chases a blond one in the grass.
A person watches a one dog chase another.
A brown dog chases a blond one in the grass does not imply a person watches.
exists e1 s1 s2 x1 x2 x3.(n_grass(x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & in(x2,x3) & n_one(x2) & a_blond(s2) & Theme(s2,x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_chase(x2) & a_another(s1) & Theme(s1,x2) & of(x2,x3) & n_dog(x3) & card_eq_1(x2) & n_person(x1))