premise: several people are bike riding.
hypothesis: A group of siblings are riding their bikes to school.
explanation_1: The first sentence doesn't give enough detail to determine if the people are siblings or if they are riding to school.
explanation_2: That several people are riding bikes together does not mean they are siblings.
explanation_3: A group of people can ride bikes together without being siblings. Just because people are riding bikes does not mean that they are going to school.
premise_logic: exists p1 s1 x1.(exists x2 x3.((x1 = x2) & n_riding(x2) & of(x2,x3) & n_bike(x3)) & n_people(x1) & a_several(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(to(e1,x4) & n_school(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_thing(x1) & of(x1,x2) & n_sibling(x2) & n_group(x1))
premise_sim: exists s1 x1.(n_people(x1) & exists x2 x3.(of(x2,x3) & n_riding(x2) & n_bike(x3) & (x1 = x2)) & a_several(s1) & Theme(s1,x1))
hypothesis_sim: exists e1 x1 x2 x3 x4.(v_ride(e1) & to(e1,x4) & of(x3,x1) & of(x1,x2) & n_thing(x1) & n_sibling(x2) & n_school(x4) & n_group(x1) & n_bike(x3) & Theme(e1,x3) & Actor(e1,x1))