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:
Who played detective Virgil Tibbs in the 1967 film 'In the Heat of the Night'?
answer:
sidney poitier


question:
What metallic element is the best conductor of electricity?
answer:
silver


question:
Actor Laurence Payne who died in February 2009, aged 89, played which fictional detective on TV?
answer:

sexton blake