A group of participants are having a meeting.
A group is having an office party.
A meeting and an office party are two different events.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_meeting(x3) & of(x1,x2) & n_participant(x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_party(x2) & of(x2,x3) & n_office(x3) & n_group(x1))