Three people wearing costumes are standing around talking.
Some people in costumes
Some in this instance means three.
exists e3 e1 e2 x1 x2 x3.(around(e2,e3) & Actor(e3,x1) & v_talk(e3) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_costume(x3) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_costume(x2) & n_people(x1))