Three boys are standing together and one has a camera.
Nobody has a camera.
When nobody is said to have a camera, one cannot have a camera.
exists e2 e1 s1 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_have(e2) & n_camera(x3) & n_thing(x2) & card_eq_1(x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_boy(x1) & card_eq_3(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_camera(x2) & n_person(x1))