instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
What is between Malaysia and Singapore?
answer:
straits of johor

question:
What Jewish mystical teachings are followed by Madonna?
answer:
kabbalah

question:
Which author who died in 1998 wrote the thrillers 'The Mask of Dimitrios' and 'Journey into Fear'?
answer:
eric ambler