(Pronoun, Third person plural (they, their, them), Genitive or Possessive case) nila
(Pronoun, Third person plural (they, their, them), Topic or Nominative case) sila
(Pronoun, Third person plural (they, their, them), Topic or Nominative case) silang
(Pronoun, Third person plural (they, their, them), Topic or Nominative case) silay