Many concertgoers lean happily toward the camera and smile.
They were at a classical concert.
Not all concerts are for classical music.
exists e1 s1 x1 x2 x3 x4.(n_smile(x4) & n_camera(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_happily(s1) & Manner(e1,s1) & toward(e1,x2) & Actor(e1,x1) & v_lean(e1) & n_concertgoer(x1) & n_quantity(x1))
exists p1 x1.(n_thing(x1) & exists s1 x2.(at(x1,x2) & n_concert(x2) & a_classical(s1) & Theme(s1,x2)))