A cleaner worker is cleaning the walls of a subway.
The worker is cleaning the walls of a McDonalds.
A worker can't clean the walls of a subway and the walls of a McDonalds simultaneously.
exists e1 x1 x2 x3 x4.(n_wall(x3) & Theme(e1,x3) & Actor(e1,x1) & v_clean(e1) & of(x3,x4) & n_subway(x4) & n_worker(x1) & of(x1,x2) & n_cleaner(x2))
exists e1 x1 x2 x3.(n_wall(x2) & n_worker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & of(x2,x3) & ne_org_mcdonalds(x3))