premise: Three men on mountain bikes go over a sand hill.
hypothesis: Men on bikes go over a sand hill.
explanation_1: Three men (men being the plural form of man) are riding bikes that are mountain bikes.
explanation_2: "men on mountain bikes go over a sand hill" means the same as "men on bikes go over a sand hill."
explanation_3: Three me are on bikes and go over a sand hill.
premise_logic: exists e1 x1 x2 x3 x4 x5.(over(e1,x4) & n_hill(x4) & of(x4,x5) & n_sand(x5) & Actor(e1,x1) & v_go(e1) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_mountain(x3) & n_man(x1) & card_eq_3(x1))
hypothesis_logic: exists e1 x1 x2 x3 x4.(over(e1,x3) & n_hill(x3) & of(x3,x4) & n_sand(x4) & Actor(e1,x1) & v_go(e1) & on(x1,x2) & n_bike(x2) & n_man(x1))
premise_sim: exists e1 x1 x2 x3 x4 x5.(v_go(e1) & over(e1,x4) & on(x1,x2) & of(x4,x5) & of(x2,x3) & n_sand(x5) & n_mountain(x3) & n_man(x1) & n_hill(x4) & n_bike(x2) & card_eq_3(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3 x4.(v_go(e1) & over(e1,x3) & on(x1,x2) & of(x3,x4) & n_sand(x4) & n_man(x1) & n_hill(x3) & n_bike(x2) & Actor(e1,x1))