premise: A man rides a black motorcycle while wearing a helmet and a van rides beside him in the distance.
hypothesis: A motorcycle and a van ride next to each other.
explanation_1: Next to is a rephrasing of beside.
explanation_2: If a man is rides a motorcycle and a van rides beside him, then a motorcycle and a van ride next to each other.
explanation_3: If a man on a motorcycle has a van riding beside him, they are next to eachother.
premise_logic: exists e1 e2 e3 s1 s2 x1 x2 x3 x4 x5.(n_distance(x5) & in(e3,x5) & a_beside(s2) & Manner(e3,s2) & Theme(e3,x1) & Actor(e3,x4) & v_ride(e3) & n_male(x1) & n_van(x4) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_wear(e2) & n_helmet(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1))
hypothesis_logic: exists s1 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & all x5.(n_other(x5) -> to(x4,x5)) & next(x2,x4) & n_thing(x4) & n_ride(x2) & of(x2,x3) & n_van(x3) & subset_of(x1,s1) & n_motorcycle(x1))