premise: A man lying on the grass on a rugby field, holding a rugby ball.
hypothesis: A man lying in the grass holding on to a ball.
explanation_1: Lying on the grass of rugby field is a man holding a ball.
explanation_2: If a man is lying on the grass on a rugby field and holding a rugby ball, he must be a rugby player.
explanation_3: Lying on the grass is the same as lying in the grass.
premise_logic: exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_grass(x3) & a_topic(x1) & Theme(e2,x6) & Actor(e2,x5) & v_hold(e2) & n_ball(x6) & a_rugby(s2) & Theme(s2,x6) & (x1 = x5) & on(e1,x4) & n_field(x4) & a_rugby(s1) & Theme(s1,x4) & on(e1,x3) & Actor(e1,x2) & v_lie(e1) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists e2 e1 x1 x2 x3 x4.(n_grass(x3) & a_topic(x1) & for(e1,e2) & r_on(e2) & to(e2,x4) & n_ball(x4) & Actor(e2,x2) & v_hold(e2) & in(e1,x3) & Actor(e1,x2) & v_lie(e1) & (x1 = x2) & n_man(x1))