A couple and child are watching people walk by.
The people are riding a bicycle.
People cannot be walking by, and riding a bicycle at the same time.
exists e2 e1 s1 x1 x2 x3 x4 x5.(Theme(e2,x4) & Actor(e2,x1) & v_watch(e2) & a_by(s1) & Manner(e1,s1) & Theme(e1,x5) & v_walk(e1) & (x4 = x5) & n_people(x4) & n_child(x3) & n_couple(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2))