a boy smiles underwater.
The boy has had a lot of swimming lessons
Just because the boy is smiling underwater doesn't mean he's had a lot of swimming lessons.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_smile(e1) & n_underwater(x2) & n_boy(x1))
exists e1 x1 x2 x3 x4.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & of(x2,x3) & n_lesson(x3) & of(x3,x4) & n_swimming(x4) & n_lot(x2))