People surrounding an American Parkinson booth.
The people are waiting to be helped.
Surrounding an American Parkinson booth does not imply that they are waiting to be helped, it may be for some other reason too.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_surround(e1) & n_booth(x3) & (x3 = x4) & ne_org_parkinson(x4) & a_american(s1) & Theme(s1,x3) & (x1 = x2) & n_people(x1))
exists e1 p1 x1.(n_people(x1) & Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2.(Theme(e2,x1) & v_help(e2)))