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.

Question: What activity do they have together?
Self-contained rewrite: What activity do Bill Clinton and Frank Aller have together?