Students practicing yoga in a class setting.
A yoga class is in progress.
Practicing implies class is in progress.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & n_setting(x4) & of(x4,x5) & n_class(x5) & Theme(e1,x3) & Actor(e1,x2) & v_practice(e1) & n_yoga(x3) & (x1 = x2) & n_student(x1))
exists p1 x1 x2.(exists x3.(in(x1,x3) & n_progress(x3)) & n_class(x1) & of(x1,x2) & n_yoga(x2))