A young man is doing a skateboarding trick while two guys take pictures and another is riding a scooter.
A group of high school friends prepare to make a skating video
Just because someone is taking pictures does not mean they are making a video. Taking pictures does not mean that you will prepare to make a video.
exists e1 e2 p1 s1 x1 x2.(exists e4 e3 x3 x4 x5 x6.(Theme(e4,x6) & Actor(e4,x5) & v_ride(e4) & n_scooter(x6) & n_thing(x5) & Theme(e3,x4) & Actor(e3,x3) & v_take(e3) & n_picture(x4) & n_guy(x3) & card_eq_2(x3)) & while(e2,p1) & Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_trick(x2) & Actor(e1,x2) & v_skateboard(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x2 x3.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x4 x5.(Theme(e2,x4) & Actor(e2,x1) & v_make(e2) & n_video(x4) & of(x4,x5) & n_skating(x5)) & of(x1,x2) & n_friend(x2) & of(x2,x3) & n_school(x3) & a_high(s1) & Theme(s1,x2) & n_group(x1))