The people on the street need to be wearing sunscreen.
The crowd on the road should be using sun-block lotion.
The key words crowd, road and sun-block"are simply synonyms for people, street and sunscreen.
exists p1 x1 x2 x3.(Topic(x2,p1) & exists e1 x4.(Theme(e1,x4) & Actor(e1,x2) & v_wear(e1) & n_sunscreen(x4)) & n_need(x2) & of(x2,x3) & n_street(x3) & n_people(x1) & a_topic(x1) & on(x1,x2))
exists e1 p1 x1 x2.(n_road(x2) & n_crowd(x1) & exists e2 s1 x3.(Theme(e2,x3) & Actor(e2,x1) & v_use(e2) & n_lotion(x3) & a_sun-block(s1) & Theme(s1,x3)) & Topic(e1,p1) & Actor(e1,x1) & v_should(e1) & on(x1,x2))