A boy sits alone at the bottom of a stone stairway.
The boy is sad and lonely.
Just because a boy is sitting alone at the bottom of a stairway doesn't mean the boy is sad and lonely.
exists e1 s1 x1 x2 x3 x4.(n_bottom(x2) & at(e1,x2) & of(x2,x3) & n_stairway(x3) & of(x3,x4) & n_stone(x4) & a_alone(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))
exists s1 s2 x1.(n_boy(x1) & Theme(s2,x1) & a_lonely(s2) & Theme(s1,x1) & a_sad(s1))