A shirtless man is riding a motorcycle.
A man is going to a concert
The man riding a motorcycle doesn't imply he is going to a concert.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & n_man(x1) & a_shirtless(s1) & Theme(s1,x1))
exists e1 x1 x2.(to(e1,x2) & n_concert(x2) & Actor(e1,x1) & v_go(e1) & n_man(x1))