A large group of people participating in a walk going under a bridge.
People are walking outdoors under a bridge.
walk is another form of walking. if they are under a bridge, that would be outdoors.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & of(x1,x2) & in(e1,x4) & under(e2,x6) & n_bridge(x6) & Actor(e2,x5) & v_go(e2) & (x4 = x5) & n_walk(x4) & Actor(e1,x3) & v_participate(e1) & (x2 = x3) & n_people(x2) & n_group(x1) & a_large(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(under(e1,x3) & n_bridge(x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_outdoors(x2) & n_people(x1))