Two men are sitting on the ground and going through their backpacks.
Some people are sorting their equipment.
Just because two men are sitting on the ground and going through their backpacks doesn't mean they are sorting their equipment.
exists e2 e1 x1 x2 x3 x4.(n_backpack(x4) & of(x4,x2) & n_thing(x2) & n_ground(x2) & through(e2,x4) & Actor(e2,x3) & v_go(e2) & n_man(x3) & card_eq_2(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sort(e1) & n_equipment(x2) & of(x2,x1) & n_thing(x1) & n_people(x1))