Group of blue shirted people.
One person alone in green.
there is either a group or one person, not both
exists s1 s2 s3 x1.(ne_org_group(s1) & a_topic(s1) & of(s1,x1) & n_people(x1) & a_shirted(s3) & Theme(s3,x1) & a_blue(s2) & Theme(s2,x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_green(x2) & r_alone(x1) & n_person(x1) & card_eq_1(x1))