A man loses control of his watercraft.
A man is on water.
one would naturally use a watercraft on water
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_lose(e1) & of(x2,x3) & n_watercraft(x3) & of(x3,x1) & n_male(x1) & n_control(x2) & n_man(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_water(x2)) & n_man(x1))