Two men are sitting on the ground and going through their backpacks.
The men are doing jumping jacks.
men sitting on the ground cannot be doing jumping jacks at the same time
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 e2 e1 x1 x2.(n_man(x1) & Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_jack(x2) & Actor(e1,x2) & v_jump(e1))