Man in american flag apparel rides bicycle.
Some dolphins are hang gliding.
A man is not dolphins, and he rides a bicycle which cannot be done while hang gliding.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x4) & in(x1,x2) & n_apparel(x2) & of(x2,x3) & n_flag(x3) & a_american(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_gliding(x2) & a_hang(s1) & Theme(s1,x2)) & n_dolphin(x1))