Conversation so far:
How was Robin Cook involved in opposition?
Robin Cook was one of the key figures in the modernisation of the Labour Party under Kinnock. He was Shadow Health Secretary (1987–92) and Shadow Trade Secretary (1992–94)
Did Robin Cook do anything else while in opposition besides Shadow Health Secretary and Shadow Trade Secretary?
Cook took on foreign affairs in 1994, the post he would become most identified with (Shadow Foreign Secretary 1994–97, Foreign Secretary 1997–2001).

Question: How long was he in opposition?
Self-contained rewrite: How long was he in opposition?