I don't know what info you may have received by PM but thought I would add this anyway.
The indexed records for for Doris and Lief show a birth date of Dec 14 1933. The publication date is Oct 01 2007 in Toronto.
Reading the obit, one sees that the date of birth given is that of the subject of the obit, Milan Lukes. The obit is published in the Globe and Mail.
As mentioned above, the only Pinter named in the obit is Harold. Why Doris and Lief would be connected to this record is a mystery. However, their names are not in bold print like the names on other similar records. Other names with the bold print seem to lead to obits that are related to their respective names. Perhaps *A* connected Doris and Lief to Harold through their 'hints' system, although an internet search indicates that they apparently would not be the parents of the playwrite Harold mentioned in the obit.
PB