People dancing in front of instructor
The group of dancers are dancing for the instructor.
Instructor is taking practice for the group of dancers.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & of(x3,x4) & n_instructor(x4) & n_front(x3) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2 x3.(n_instructor(x3) & n_group(x1) & for(e1,x3) & Actor(e1,x1) & v_dance(e1) & of(x1,x2) & n_dancer(x2))