Two guys in yellow riding a yellow bike and having fun.
Two people sadly walking.
They can either be having fun riding or sadly walking, not both.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(Theme(e2,x6) & Actor(e2,x4) & v_have(e2) & n_fun(x6) & in(x4,x5) & n_yellow(x5) & n_guy(x4) & card_eq_2(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & a_yellow(s1) & Theme(s1,x3) & in(x1,x2) & n_yellow(x2) & n_guy(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(a_topic(x1) & a_sadly(s1) & Manner(e1,s1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))