premise: A man in a mask in the back of a service vehicle.
hypothesis: A woman is showing her head while riding on a horse
explanation_1: ITs either a man or a woman. The person is either showing their head or not . They cannot be on a horse and riding a service vehicle at the same time
explanation_2: A man in a mask is not a woman showing her head.  Also the back of a service vehicle is very different then rising a horse.
explanation_3: There can be either a man or a woman.
premise_logic: exists x1 x2 x3 x4 x5.(n_back(x3) & a_topic(x1) & in(x1,x2) & in(x2,x3) & of(x3,x4) & n_vehicle(x4) & of(x4,x5) & n_service(x5) & n_mask(x2) & n_man(x1))
hypothesis_logic: exists e2 e1 x1 x2 x3.(while(e1,e2) & on(e2,x3) & n_horse(x3) & Actor(e2,x1) & v_ride(e2) & Theme(e1,x2) & Actor(e1,x1) & v_show(e1) & n_head(x2) & of(x2,x1) & n_female(x1) & n_woman(x1))
premise_sim: exists x1 x2 x3 x4 x5.(of(x4,x5) & of(x3,x4) & n_vehicle(x4) & n_service(x5) & n_mask(x2) & n_man(x1) & n_back(x3) & in(x2,x3) & in(x1,x2) & a_topic(x1))
hypothesis_sim: exists e2 e1 x1 x2 x3.(while(e1,e2) & v_show(e1) & v_ride(e2) & on(e2,x3) & of(x2,x1) & n_woman(x1) & n_horse(x3) & n_head(x2) & n_female(x1) & Theme(e1,x2) & Actor(e2,x1) & Actor(e1,x1))