Two boys are walking inside a human-size exercise-wheel.
Tow boys are standing outside a human sized exercise wheel.
Walking inside is the opposite of standing outside.
exists e1 s1 x1 x2.(inside(e1,x2) & n_exercise-wheel(x2) & a_human-size(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1) & card_eq_2(x1))
exists e1 s1 s2 x1 x2 x3 x4.(outside(e1,x3) & n_wheel(x3) & of(x3,x4) & n_exercise(x4) & a_sized(s2) & Theme(s2,x3) & a_human(s1) & Theme(s1,x3) & Actor(e1,x1) & v_stand(e1) & n_boy(x1) & (x1 = x2) & ne_nam_tow(x2))