A baby boy is being fed a drink.
There is a baby drinking.
A baby is being fed a drink, therefore the baby is drinking.
exists e1 x1 x2 x3.(Recipient(e1,x3) & Theme(e1,x1) & v_feed(e1) & n_drink(x3) & n_boy(x1) & of(x1,x2) & n_baby(x2))
exists p1 x1 x2 x3.((x1 = x2) & n_drinking(x2) & of(x2,x3) & n_baby(x3))