Cheerleaders are practicing pyramid routines.
Cheerleaders are sitting.
One cannot be practicing pyramid routines and sitting at the same time.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_practice(e1) & n_routine(x2) & a_pyramid(s1) & Theme(s1,x2) & n_cheerleader(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_cheerleader(x1))