Two men working on a small engine on a dirt road.
Two men on a red dirt road trying to repair a motorcycle.
Two men working on a small engine doesn't necessarily mean they are trying to repair a motorcycle, nor that the dirt road is red.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x4) & n_road(x4) & of(x4,x5) & n_dirt(x5) & on(e1,x3) & n_engine(x3) & a_small(s1) & Theme(s1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 p1 s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & Topic(e1,p1) & Actor(e1,x4) & v_try(e1) & exists e2 x5.(Theme(e2,x5) & Actor(e2,x4) & v_repair(e2) & n_motorcycle(x5)) & (x2 = x4) & n_road(x2) & of(x2,x3) & n_dirt(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))