premise: A young couple riding on a bus with the boy's arm around the girl.
hypothesis: The couple are on a bus.
explanation_1: young couple riding on a bus is same as couple are on a bus.
explanation_2: The boy’s arm is around the girl implies that they are couple.
explanation_3: In order to ride on a bus, the couple must be on a bus.
premise_logic: exists s1 x1 x2 x3 x4 x5 x6.(n_girl(x6) & n_arm(x5) & of(x5,x4) & n_boy(x4) & a_topic(x1) & on(x1,x3) & with(x3,x5) & around(x5,x6) & n_bus(x3) & n_riding(x1) & of(x1,x2) & n_couple(x2) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 x1.(n_couple(x1) & exists x2.(on(x1,x2) & n_bus(x2)))