A seagull flies under another with food while three others follow.
There are seagulls flying.
The fact that there is one seagull flying under another while three others follow means there are multiple seagulls flying
exists e1 p1 x1 x2 x3.(exists e2 x4.(Actor(e2,x4) & v_follow(e2) & -(x4 = x1) & n_person(x4) & card_eq_3(x4)) & n_person(x1) & while(e1,p1) & with(e1,x3) & n_food(x3) & under(e1,x2) & n_thing(x2) & Actor(e1,x1) & v_fly(e1) & n_seagull(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_fly(e1) & (x2 = x3) & n_seagull(x2))