A male security officer stands at his post behind another man in a patterned sweater.
An officer is away from his post while talking to a man in a plain sweater.
An officer cannot stand at his post and away from his post at the same time, and a plain sweater cannot be a patterned sweater.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_man(x4) & in(e1,x6) & n_sweater(x6) & a_patterned(s2) & Theme(s2,x6) & at(e1,x3) & behind(x3,x5) & n_man(x5) & -(x5 = x4) & n_post(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_stand(e1) & n_officer(x1) & of(x1,x2) & n_security(x2) & a_male(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3 x4.(while(s1,e1) & in(e1,x4) & n_sweater(x4) & a_plain(s2) & Theme(s2,x4) & to(e1,x3) & n_man(x3) & Actor(e1,x1) & v_talk(e1) & from(s1,x2) & n_post(x2) & of(x2,x1) & n_male(x1) & Theme(s1,x1) & a_away(s1) & n_officer(x1))