A man in military camouflage is working a shepherd type dog in a grassy area while being observed by others in a parking lot in uniform.
The man is observed by noone.
He is either observed by someone or observed by nooone. The first sentence states others observing whereas the second states otherwise.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9.(while(e1,e2) & in(e2,x9) & n_uniform(x9) & in(e2,x7) & n_lot(x7) & of(x7,x8) & n_parking(x8) & Actor(e2,x6) & -(x6 = x1) & n_person(x1) & n_person(x6) & Theme(e2,x1) & v_observe(e2) & in(e1,x5) & n_area(x5) & a_grassy(s3) & Theme(s3,x5) & Theme(e1,x3) & Actor(e1,x1) & v_work(e1) & n_dog(x3) & of(x3,x4) & n_type(x4) & a_shepherd(s2) & Theme(s2,x3) & in(x1,x2) & n_camouflage(x2) & a_military(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Actor(e1,x2) & n_noone(x2) & Theme(e1,x1) & v_observe(e1))