A car wash worker cleaning the interior of the wheel.
a person cleaning for a tip
worker cleaning the wheel does not always mean he expects a tip
exists e1 x1 x2 x3 x4 x5 x6.(n_wheel(x6) & n_interior(x5) & a_topic(x1) & Theme(e1,x5) & Actor(e1,x4) & v_clean(e1) & of(x5,x6) & (x1 = x4) & n_worker(x1) & of(x1,x3) & n_wash(x3) & of(x1,x2) & n_car(x2))
exists x1 x2 x3.(a_topic(x1) & for(x1,x3) & n_tip(x3) & Time(x1,x2) & n_cleaning(x2) & n_person(x1))