Conversation so far:
What was the relation between Bill and Oxford?
Upon graduating from Georgetown in 1968, Clinton won a Rhodes Scholarship to University College in Oxford, England.
What did he study in oxford?
he initially read for a B.Phil.
in Philosophy, Politics, and Economics.
Did he have any social activity in the school?
During his time at Oxford, Clinton befriended fellow American Rhodes Scholar Frank Aller.
What activity do they have together?
Sara Maitland said of Clinton, "I remember Bill and Frank Aller taking me to a pub in Walton Street in the summer term of 1969.

Question: What time did that happened?
Self-contained rewrite: What time did Bill Clinton and Frank Aller take Sara Maitland to a pub in Walton Street?