premise: Several children in full riding gear are on horseback in a grassy field carrying polo equipment.
hypothesis: The children are swinging on swings at the playground.
explanation_1: The children cannot be swinging and on horseback. A playground is usually not in a grassy field.
explanation_2: there are not grassy field at the playgrounds
explanation_3: They cannot be at the playground as well as in a grassy field.
premise_logic: exists e1 p1 s1 s2 s3 x1 x2 x3 x4.(for(p1,e1) & Theme(e1,x4) & Actor(e1,x1) & v_carry(e1) & n_equipment(x4) & a_polo(s3) & Theme(s3,x4) & exists s4 x5 x6.(on(x1,x5) & in(x5,x6) & n_field(x6) & a_grassy(s4) & Theme(s4,x6) & n_horseback(x5)) & in(x1,x2) & n_gear(x2) & of(x2,x3) & n_riding(x3) & a_full(s2) & Theme(s2,x2) & n_child(x1) & a_several(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2 x3.(n_playground(x3) & n_child(x1) & on(e1,x2) & at(x2,x3) & n_swing(x2) & Actor(e1,x1) & v_swing(e1))