A man is lighting a marijuana roach.
A man is getting high on marijuana.
The man can light his marijuana without getting high.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_light(e1) & n_roach(x2) & of(x2,x3) & n_marijuana(x3) & n_man(x1))
exists e1 p1 x1 x2.(on(e1,x2) & n_marijuana(x2) & exists s1.(Theme(s1,x1) & a_high(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & n_man(x1))