Group of people reading books on sunny day in park.
There is only one person.
A group requires more than one person.
exists e1 s1 s2 x1 x2 x3 x4 x5.(ne_org_group(s1) & a_topic(s1) & of(s1,x1) & in(e1,x5) & n_park(x5) & on(e1,x4) & n_day(x4) & a_sunny(s2) & Theme(s2,x4) & Theme(e1,x3) & Actor(e1,x2) & v_read(e1) & n_book(x3) & (x1 = x2) & n_people(x1))
exists p1 x1 x2.((x1 = x2) & n_person(x2) & card_eq_1(x2) & r_only(x2))