people on the subway are reading a book and looking around like they are bored.
People are on the subway.
Are on the subway is a rephrasing of on the subway.
exists e2 e3 e1 s1 x1 x2 x3 x4 x5.(n_thing(x2) & n_subway(x5) & n_subway(x2) & a_around(s1) & Manner(e2,s1) & like(e2,e3) & Theme(e3,x2) & v_bore(e3) & Actor(e2,x4) & v_look(e2) & on(x4,x5) & n_people(x4) & Theme(e1,x3) & Actor(e1,x1) & v_read(e1) & n_book(x3) & on(x1,x2) & n_people(x1))
exists p1 x1 x2.(n_subway(x2) & on(x1,x2) & n_people(x1))