People in a crowded city street.
A man jumps to catch a ball.
People refers to a group of people while man refers to a single person.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_street(x2) & of(x2,x3) & n_city(x3) & a_crowded(s1) & Theme(s1,x2) & n_people(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_jump(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2) & n_ball(x2)) & n_man(x1))