A man and young boy in waders stand in very shallow water.
The people are outside.
Waders stand in very shallow water is definitely outside.
exists e1 s1 s2 x1 x2 x3 x4 x5.(in(e1,x5) & n_water(x5) & a_shallow(s2) & Theme(s2,x5) & r_very(x5) & Actor(e1,x1) & v_stand(e1) & subset_of(x3,x1) & in(x3,x4) & n_wader(x4) & n_boy(x3) & a_young(s1) & Theme(s1,x3) & subset_of(x2,x1) & n_man(x2))
exists s1 x1.(n_people(x1) & Theme(s1,x1) & a_outside(s1))