An older man sitting on a decrepit bike.
A man pedals a bike.
An older man sitting on a bike doesn't imply that he pedals it.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_bike(x3) & of(x3,x4) & n_decrepit(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pedal(e1) & n_bike(x2) & n_man(x1))