Three musical performers do their act.
A person is all alone.
There are three people, not one.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_act(x2) & of(x2,x1) & n_thing(x1) & n_performer(x1) & a_musical(s1) & Theme(s1,x1) & card_eq_3(x1))
exists s1 x1.(r_all(s1) & Theme(s1,x1) & a_alone(s1) & n_person(x1))