premise: Some young boys ride bikes in the street.
hypothesis: These boys are on bikes
explanation_1: You would have to be on a bike in order to ride a bike.
explanation_2: Boy is the term for a young male, ergo all boys are young.
explanation_3: You need to be on bikes to ride them, thus the boys are on bikes.
premise_logic: exists e1 s1 x1 x2 x3.(n_street(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & in(x2,x3) & n_bike(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists p1 x1.(n_boy(x1) & exists x2.(on(x1,x2) & n_bike(x2)))