Four boys in water are hanging on to the concrete ledge.
four boys are holding onto the concrete ledge
Hanging on to is holding onto.
exists e1 s1 x1 x2 x3.(n_ledge(x3) & a_concrete(s1) & Theme(s1,x3) & r_on(e1) & to(e1,x3) & Actor(e1,x1) & v_hang(e1) & in(x1,x2) & n_water(x2) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(n_ledge(x2) & of(x2,x3) & n_concrete(x3) & onto(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_boy(x1) & card_eq_4(x1))