A person with a stocking cap on is sitting down on a grassy plain with a mountain behind them.
The person is sitting in front of a mountain on a plain.
'in front of a mountain on a plain' is a rewording of 'grassy plain with a mountain behind'
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5.(with(e2,x5) & behind(x5,x1) & n_thing(x1) & n_mountain(x5) & on(e2,x4) & n_plain(x4) & a_grassy(s3) & Theme(s3,x4) & a_down(s2) & Manner(e2,s2) & Actor(e2,x1) & v_sit(e2) & with(x1,x2) & Theme(s1,x3) & a_on(s1) & (x2 = x3) & n_cap(x2) & Actor(e1,x2) & v_stock(e1) & n_person(x1))
exists e1 x1 x2 x3 x4.(n_person(x1) & on(e1,x4) & n_plain(x4) & in(e1,x2) & of(x2,x3) & n_mountain(x3) & n_front(x2) & Actor(e1,x1) & v_sit(e1))