Senica v. INS, ___ F.3d ___, No. 92-70423 (9th Cir. Feb. 14, 1993) (parent's knowledge of a child's ineligibility for admission to the U.S. can be imputed to the child to preclude discretionary relief under INA 212(k); effectively prevents a parent from making a derivative claim for a waiver under INA 241(f) as the parent of a noncitizen lawfully admitted for permanent residence).