The little girl is wearing a floating device in the water.
The young child is using something to float in the water.
The little girl is a young child who is using something to float on water which is known as a floating device
exists e1 s1 s2 x1 x2 x3.(n_water(x3) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & in(x2,x3) & n_device(x2) & a_floating(s2) & Theme(s2,x2))
exists e1 p1 s1 x1 x2 x3.(n_water(x3) & n_child(x1) & a_young(s1) & Theme(s1,x1) & Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2.(in(e2,x3) & Actor(e2,x1) & v_float(e2)) & n_thing(x2))