People crossing the street.
Humans engaging in outdoor activity.
crossing the street is not engaging in outdoor activity.
exists e1 x1 x2 x3.(n_street(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_cross(e1) & (x1 = x2) & n_people(x1))
exists e1 s1 x1 x2.(ne_nam_humans(x1) & in(e1,x2) & n_activity(x2) & a_outdoor(s1) & Theme(s1,x2) & Actor(e1,x1) & v_engage(e1))