Two people are riding along the side of the road on bicycles, the one in front is wearing a helmet.
Two people are riding along the side of the road on scooters, the one in front is wearing a straw hat.
A bicycle is not a scooter. One cannot wear a helmet at the same time one is wearing a straw hat.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_thing(x2) & card_eq_1(x2) & n_road(x3) & n_side(x2) & Theme(e2,x6) & Actor(e2,x2) & v_wear(e2) & n_helmet(x6) & in(x2,x5) & n_front(x5) & on(e1,x4) & n_bicycle(x4) & along(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_2(x1))
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(n_thing(x2) & card_eq_1(x2) & n_road(x3) & n_side(x2) & Theme(e2,x6) & Actor(e2,x2) & v_wear(e2) & n_hat(x6) & of(x6,x7) & n_straw(x7) & in(x2,x5) & n_front(x5) & on(e1,x4) & n_scooter(x4) & along(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_2(x1))