Ricky, I enjoyed a matinee class with a fun talk. Thanks for updating me on current situation in the Philippines. And I wish I was able to explain about the Japanese system more precisely. I think I am familiar with relative pronouns. If my memories are correct and still I'd like to insist, 'who' can be replaceable to 'whom' in colloquial usage...right? Of course I know your explanation about the grammar is truly correct though...