Some people are waiting at the subway station.
The people are inside.
A subway station is inside.
exists e1 x1 x2 x3.(n_station(x2) & of(x2,x3) & n_subway(x3) & at(e1,x2) & Actor(e1,x1) & v_wait(e1) & n_people(x1))
exists e1 s1 x1.(n_people(x1) & a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_be(e1))