Three uniformed workers are cleaning the outside windows of a restaurant.
windows being cleaned by uniformed workers
Sentence one describes uniformed workers cleaning windows while sentence two says the same in past tense.
exists e1 s1 s2 x1 x2 x3.(n_window(x2) & a_outside(s2) & Theme(s2,x2) & Theme(e1,x2) & Actor(e1,x1) & v_clean(e1) & of(x2,x3) & n_restaurant(x3) & n_worker(x1) & a_uniformed(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & n_worker(x3) & a_uniformed(s1) & Theme(s1,x3) & Theme(e1,x2) & v_clean(e1) & (x1 = x2) & n_window(x1))