Two people wearing helmets riding in a four wheeler along next to the ocean.
Two people are climbing a tree.
People who are riding a four wheeler are not climbing a tree.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(n_ocean(x7) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & in(e1,x5) & along(x5,x6) & to(x6,x7) & n_next(x6) & n_wheeler(x5) & card_eq_4(x5) & Actor(e1,x4) & v_ride(e1) & (x3 = x4) & n_helmet(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_tree(x2) & n_people(x1) & card_eq_2(x1))