People are stretching on yoga mats.
The people stretched on yoga mats.
People has to do stretching to be stretched.
exists e1 x1 x2 x3.(on(e1,x2) & n_mat(x2) & of(x2,x3) & n_yoga(x3) & Actor(e1,x1) & v_stretch(e1) & n_people(x1))
exists e1 x1 x2 x3.(n_people(x1) & on(e1,x2) & n_mat(x2) & of(x2,x3) & n_yoga(x3) & Actor(e1,x1) & v_stretch(e1))