A young man with no shirt on is riding a bike.
The man is shirtless
A man with no shirt is shirtless.
exists s1 x1.(-exists e1 s2 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & n_bike(x4) & with(x1,x2) & Theme(s2,x3) & a_on(s2) & (x2 = x3) & n_shirt(x2)) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_shirtless(s1))