people are dancing and enjoying.
some people are enjoying their time with dance
People dancing and enjoying does not necessarily imply that only some people are enjoying.
exists e2 e1 x1 x2.(Actor(e2,x2) & v_enjoy(e2) & n_people(x2) & Actor(e1,x1) & v_dance(e1) & n_people(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & with(x2,x3) & n_dance(x3) & n_time(x2) & of(x2,x1) & n_thing(x1) & n_people(x1))