A group of people are either standing or sitting, some are wearing hats and scarves, while some are not.
A group of people, none with hats or scarves, are lieing on the ground.
If there are none with hats or scarves, then there cannot be some wearing hats and scarves.  People cannot be standing or sitting while also lieing on the ground.
(exists e1 s1 x1 x2.(a_either(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_people(x2) & n_group(x1)) | exists e3 e2 p1 x3 x4 x5 x6 x7.(while(e3,e2) & exists x8.(-exists e4.(Actor(e4,x8) & v_be(e4)) & n_thing(x8)) & while(e3,p1) & Theme(e3,x5) & Actor(e3,x4) & v_wear(e3) & subset_of(x7,x5) & n_scarf(x7) & subset_of(x6,x5) & n_hat(x6) & n_thing(x4) & Actor(e2,x3) & v_sit(e2) & n_thing(x3)))
exists e1 x1 x2 x3.(n_ground(x3) & on(e1,x3) & Actor(e1,x1) & v_lie(e1) & of(x1,x2) & (exists x4 x5.(rel(x2,x4) & with(x4,x5) & n_hat(x5) & n_none(x4)) | exists x6.(rel(x2,x6) & n_scarf(x6))) & n_people(x2) & n_group(x1))