A girl is preparing to pour a bucket of water on man wearing a white shirt.
This is another ice bucket challenge.
Some one Preparing to pure a  bucket of water doesn't imply it is a ice bucket challenge
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 e3 s1 x2 x3 x4 x5.(for(e2,e3) & Theme(e3,x5) & Actor(e3,x1) & v_wear(e3) & n_shirt(x5) & a_white(s1) & Theme(s1,x5) & on(e2,x4) & n_man(x4) & Theme(e2,x2) & Actor(e2,x1) & v_pour(e2) & of(x2,x3) & n_water(x3) & n_bucket(x2)) & n_girl(x1))
exists p1 x1.(n_thing(x1) & exists x2 x3 x4 x5 x6.((x1 = x5) & n_challenge(x5) & of(x5,x6) & n_bucket(x6) & of(x5,x3) & n_ice(x3) & -(x5 = x2) & n_challenge(x2) & of(x2,x4) & n_bucket(x4) & of(x2,x3)))