A guy sitting in a tube in the water.
The man is wet
Sitting in water implies they are wet
exists e1 x1 x2 x3 x4.(n_water(x4) & a_topic(x1) & in(e1,x4) & in(e1,x3) & n_tube(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_guy(x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_wet(s1))