Conversation so far:
Who is Miss Saigon in relation to Lea Salonga?
In 1989 Lea Salonga was selected to play Kim in the debut production of the musical Miss Saigon in London.

Question: How long did she protrat that positon?
Self-contained rewrite: How long did Lea Salonga protray Kim in the debut production of the musical Miss Saigon in London?