Three young men stand against a wall talking while one young boy looks forward holding a poster.
3 brothers stand up against a wall while the 4th brother holds a poster.
Three young men does not say they are brothers. A young boy does not mean he is their brother.
exists e1 e2 p1 s1 x1 x2 x3.(against(e1,x2) & exists e4 e3 p2 s2 x4 x5.(for(e3,e4) & Theme(e4,x5) & Actor(e4,x4) & v_hold(e4) & n_poster(x5) & exists s3.(Theme(s3,x4) & a_forward(s3)) & Topic(e3,p2) & Actor(e3,x4) & v_look(e3) & n_boy(x4) & a_young(s2) & Theme(s2,x4) & card_eq_1(x4)) & while(e2,p1) & Actor(e2,x3) & v_talk(e2) & (x2 = x3) & n_wall(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 p1 s1 s2 x1 x2.(exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_hold(e2) & n_poster(x3)) & n_brother(x1) & n_brother(x1) & a_4th(s2) & Theme(s2,x1) & while(e1,p1) & a_up(s1) & Manner(e1,s1) & against(e1,x2) & n_wall(x2) & Actor(e1,x1) & v_stand(e1) & n_date(x1) & a_date_day_03(x1) & a_date_day_03(x1))