Two men are taking pictures while standing beside an automobile.
Two men sketch in sketchbooks next to a lamp post.
Two men taking pictures could not simultaneously be sketching in sketchbooks. An automobile is not identical to a lamp post.
exists e2 e1 x1 x2 x3.(while(e1,e2) & beside(e2,x3) & n_automobile(x3) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4 x5.(in(e1,x2) & to(x3,x4) & n_post(x4) & of(x4,x5) & n_lamp(x5) & next(x2,x3) & n_thing(x3) & n_sketchbook(x2) & Actor(e1,x1) & v_sketch(e1) & n_man(x1) & card_eq_2(x1))