A group of people are doing yoga.
The people are doing yoga
people implies a group.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_yoga(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_yoga(x2))