A large amount of people sit outside some sort of water related event with Canadian flags.
People are waiting indoors for a pool to open.
People are either sitting outside or waiting indoors--they cannot being doing both.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(outside(e1,x3) & of(x3,x4) & with(x4,x6) & n_flag(x6) & a_canadian(s2) & Theme(s2,x6) & n_event(x4) & Theme(e2,x4) & v_relate(e2) & of(x4,x5) & n_water(x5) & n_sort(x3) & Actor(e1,x1) & v_sit(e1) & of(x1,x2) & n_people(x2) & n_amount(x1) & a_large(s1) & Theme(s1,x1))
exists e1 p1 x1 x2 x3 x4.(Topic(e1,p1) & exists e2.(Actor(e2,x1) & v_open(e2)) & for(e1,x4) & n_pool(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wait(e1) & n_indoor(x3) & n_people(x2) & n_people(x1))