Many people are in an indoor swimming pool and one girl is in the act of jumping in headfirst.
The people are indoors.
if the people are in an indoor swimming pool, then they are indoors.
exists p1 p2 x1 x2 x5.(n_act(x5) & exists e1 x6 x7.(in(x2,x5) & in(e1,x7) & n_headfirst(x7) & Actor(e1,x6) & v_jump(e1) & (x5 = x6)) & n_girl(x2) & card_eq_1(x2) & exists s1 x3 x4.(in(x1,x3) & n_pool(x3) & of(x3,x4) & n_swimming(x4) & a_indoor(s1) & Theme(s1,x3)) & n_people(x1) & n_quantity(x1))
exists p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_indoor(x2)))