A young boy is swimming in an underground pool right next to the 3.5 ft. sign.
A child is hanggliding.
Swimming and hanggliding are different.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(n_sign(x4) & of(x4,x5) & n_ft.(x5) & card_eq_3.5(x4) & in(e1,x2) & r_right(s3) & to(s3,x4) & Theme(s3,x3) & a_next(s3) & (x2 = x3) & n_pool(x2) & a_underground(s2) & Theme(s2,x2) & Actor(e1,x1) & v_swim(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_hangglide(e1) & n_child(x1))