A man and a young boy are walking across a street as another man is riding by on a bicycle.
A father and son watch a man ride a bike.
There is nothing to indicate that the man and the young boy are father and son.
exists e1 p1 s1 x1 x2 x3 x4.(exists e2 s2 x5 x6.(on(e2,x6) & n_bicycle(x6) & a_by(s2) & Manner(e2,s2) & Actor(e2,x5) & v_ride(e2) & n_man(x5) & -(x5 = x2)) & n_man(x2) & n_man(x2) & as(e1,p1) & across(e1,x4) & n_street(x4) & Actor(e1,x1) & v_walk(e1) & subset_of(x3,x1) & n_boy(x3) & a_young(s1) & Theme(s1,x3) & subset_of(x2,x1))
exists x1 x2 x3.(all x4.(n_bike(x4) -> exists e1 x5 x6.(Theme(e1,x5) & Actor(e1,x1) & v_watch(e1) & for(x5,x4) & n_ride(x5) & of(x5,x6) & n_man(x6))) & n_son(x3) & n_father(x2) & subset_of(x3,x1) & subset_of(x2,x1))