Men standing around talking on cellphones.
Everyone who is on the phone is sitting down.
If everyone on the phone is sitting down, the men are not standing while talking on cellphones.
exists e1 e2 x1 x2 x3.(a_topic(x1) & around(e1,e2) & on(e2,x3) & n_cellphone(x3) & Actor(e2,x2) & v_talk(e2) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))
exists x3.(n_phone(x3) & all x1.(n_person(x1) -> exists e1 p1 s1 x2.(a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & on(x2,x3) & (x1 = x2))))