A man wearing a backpack and helmet riding a bicycle.
The man is running.
The man can't be both running and riding a bicycle.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_ride(e2) & n_bicycle(x4) & n_helmet(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_backpack(x2) & n_man(x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_run(e1))