A person riding a bicycle travels down an overgrown hill.
A young boy is riding his blue bike.
A person can be someone other than a young boy. A bike can be many different colors, not just blue.
exists e2 e1 s1 s2 x1 x2 x3 x4.(a_down(s2) & Manner(e2,s2) & Theme(e2,x4) & Actor(e2,x1) & v_travel(e2) & n_hill(x4) & a_overgrown(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2) & n_person(x1))
exists e1 s1 s2 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & a_blue(s2) & Theme(s2,x2) & of(x2,x1) & n_male(x1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))