Three boys are together while one is taking a picture with his camera.
The boys are playing football
Three boys are together while one is taking a picture with his camera does not necessary that they are playing football
exists p1 s1 x1.(exists e1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & with(x3,x4) & n_camera(x4) & of(x4,x3) & n_male(x3) & n_picture(x3) & n_thing(x2) & card_eq_1(x2)) & while(s1,p1) & Theme(s1,x1) & a_together(s1) & n_boy(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_football(x2))