A boy is jumping on skateboard in the middle of a red bridge.
The boy is wearing safety equipment.
Just because the boy is jumping on a skateboard does not imply he is wearing safety equipment
exists e1 s1 x1 x2 x3 x4.(n_middle(x3) & in(e1,x3) & of(x3,x4) & n_bridge(x4) & a_red(s1) & Theme(s1,x4) & on(e1,x2) & n_skateboard(x2) & Actor(e1,x1) & v_jump(e1) & n_boy(x1))
exists e1 x1 x2 x3.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_equipment(x2) & of(x2,x3) & n_safety(x3))