A boy in a blue shirt throwing a rock into water.
A person throwing a rock.
A boy in a blue shirt throwing a rock into water, couldn't at the same time just be a person throwing a rock.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & into(e1,x5) & n_water(x5) & Theme(e1,x4) & Actor(e1,x3) & v_throw(e1) & n_rock(x4) & (x2 = x3) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_throw(e1) & n_rock(x3) & (x1 = x2) & n_person(x1))