premise: A group of people are sight seeing and taking pictures.
hypothesis: the group is at home
explanation_1: The group cannot be at home and be sight seeing simultaneously
explanation_2: The group of people cannot be at home if they are sight seeing.
explanation_3: Where they are ... sight seeing implies the group is away from home
premise_logic: exists e1 e2 p1 x1 x2 x3 x4.(for(p1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & n_picture(x4) & for(p1,e1) & Theme(e1,x3) & Actor(e1,x1) & v_see(e1) & n_picture(x3) & exists x5.((x1 = x5) & n_sight(x5)) & of(x1,x2) & n_people(x2) & n_group(x1))
hypothesis_logic: exists p1 x1.(n_group(x1) & exists x2.(at(x1,x2) & n_home(x2)))