A young man is riding his bicycle.
A young man is cycling.
riding his bicycle is the same as cycling
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1.(Actor(e1,x1) & v_cycle(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))