Members of a strike at Yale University.
Members of a club are playing chess.
They're either members of Yale, or members of the club playing chess, not both.
exists x1 x2 x3 x4.(ne_org_university(x3) & (x3 = x4) & ne_org_yale(x4) & a_topic(x1) & of(x1,x2) & at(x2,x3) & n_strike(x2) & n_member(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_chess(x3) & of(x1,x2) & n_club(x2) & n_member(x1))