A man, and presumably his son, out on a bike ride.
a man is riding a ferris wheel
He can't be on a bike ride if he is on a ferris wheel
exists s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & on(x3,x4) & n_ride(x4) & of(x4,x5) & n_bike(x5) & out(x2,x3) & n_thing(x3) & r_presumably(x2) & n_son(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_wheel(x2) & of(x2,x3) & n_ferris(x3) & n_man(x1))