People walking and riding bikes on the sidewalk.
The people all see each other.
If there are people walking and riding bikes on a sidewalk the people likely see each other
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_sidewalk(x6) & n_sidewalk(x3) & on(e2,x6) & Theme(e2,x5) & Actor(e2,x4) & v_ride(e2) & n_bike(x5) & n_people(x4) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_bike(x2) & n_people(x1))
exists x1.(n_people(x1) & all x2.(n_other(x2) -> exists e1 s1.(a_all(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_see(e1))))