premise: several people are bike riding.
hypothesis: Some people are riding bicycles.
explanation_1: Some people riding means the same thing as several people riding bikes
explanation_2: Several can mean some. Bike riding is another phrasing of riding bicycles. (Bike is a shortened form of the word bicycle)
explanation_3: A bike is for riding.
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.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_people(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.(v_ride(e1) & n_people(x1) & n_bicycle(x2) & Theme(e1,x2) & Actor(e1,x1))