A group of five people are leading a meeting.
A group has lunch.
One is not leading a meeting and having lunch simultaneously.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_lead(e1) & n_meeting(x3) & of(x1,x2) & n_people(x2) & card_eq_5(x2) & n_group(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_lunch(x2) & n_group(x1))