A person working while sitting on a scaffold high up in the air.
The window washer continues her duties.
Someone on a scaffold might not be a window washer.
exists e2 e1 x1 x2 x3 x4.(n_air(x4) & a_topic(x1) & while(e1,e2) & in(e2,x4) & on(e2,x3) & n_high(x3) & r_up(x3) & n_scaffold(x3) & Actor(e2,x2) & v_sit(e2) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_person(x1))
exists e1 x1 x2 x3.(n_duty(x3) & of(x3,x1) & n_female(x1) & n_washer(x1) & of(x1,x2) & n_window(x2) & Theme(e1,x3) & Actor(e1,x1) & v_continue(e1))