300
"I'd like to introduce you to my sister Clara, who lives in Madrid, to Benedict, my brother who doesn't, and to my only other sibling, Hilary." Which of the following is correct?
1) Hilary is male
2) Hilary is female
3) It is impossible to know
1) Hilary is male
He's male. The absence of a comma before "who doesn't" implies that there are other brothers. A comma after "my brother" would mean that there was only one brother.