A group of people are doing yoga.
The people are working out
People can be working out in other ways beside yoga.
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 s1 x1.(n_people(x1) & a_out(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1))