A boy sitting in water.
A boy is about to go swimming.
Sitting in water does not necessarily imply that the boy is about to go swimming.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_water(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_boy(x1))
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_swimming(x2)) & n_boy(x1))