Singers performing to the crowd.
People are tying thier shoes.
One refers to singers and the other refers to people.
exists e1 x1 x2 x3.(n_crowd(x3) & a_topic(x1) & to(e1,x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_singer(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_tie(e1) & n_shoe(x2) & r_more(s1) & a_thier(s1) & Theme(s1,x2) & n_people(x1))