Many people are standing in a crowd.
People are waiting for concert tickets.
People can stand around and not be waiting for tickets.
exists e1 x1 x2.(in(e1,x2) & n_crowd(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & n_quantity(x1))
exists e1 x1 x2 x3.(for(e1,x2) & n_ticket(x2) & of(x2,x3) & n_concert(x3) & Actor(e1,x1) & v_wait(e1) & n_people(x1))