premise: A group of schoolgirls are standing together while one is taking pictures.
hypothesis: Nobody is using the camera.
explanation_1: The girls cannot both have nobody using the camera and have someone taking pictures
explanation_2: The group of  girls are obviously waiting for one to take their photo so there has to be somebody not nobody running camera
explanation_3: She cannot be taking pictures without using the camera.
premise_logic: exists e1 p1 s1 x1 x2.(exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_take(e2) & n_picture(x4) & n_thing(x3) & card_eq_1(x3)) & while(e1,p1) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_schoolgirl(x2) & n_group(x1))
hypothesis_logic: exists x2.(n_camera(x2) & -exists e1 x1.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_person(x1)))