Conversation so far:
Where did Robson play internationally?
Robson participated in two ambassadorial Football Association tours in the West Indies in 1955 and South Africa in 1956.
Where else did he play after 1956?
his debut in a November 1957 victory against France.
Who was he playing for in 1957?
the England national team.

Question: Which team did he play for longest?
Self-contained rewrite: Which team did Robson play for longest?