A man is mowing the lawn with a red lawn mower.
A man rides his mower to cut grass.
A red lawn mower isn't necessarily a lawn mower that one rides.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_mow(e1) & with(x2,x3) & n_mower(x3) & of(x3,x2) & n_lawn(x2) & n_lawn(x2) & a_red(s1) & Theme(s1,x3) & n_man(x1))
exists e1 p1 x1 x2 x3.(Topic(e1,p1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x1) & v_cut(e2) & n_grass(x4)) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_mower(x3) & of(x3,x1) & n_male(x1) & n_man(x2) & n_man(x1))