People are sitting on scaffolding on a large, white building.
People are standing on scaffolding.
Sitting and standing are mutually exclusive activities.
exists e2 e1 s1 s2 s3 s4 x1 x2.(for(e1,e2) & on(e2,x2) & n_building(x2) & a_white(s4) & Theme(s4,x2) & a_,(s3) & Theme(s3,x2) & a_large(s2) & Theme(s2,x2) & Actor(e2,x1) & v_scaffold(e2) & a_on(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 x1 x2.(on(e1,x2) & n_scaffolding(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))