Conversation so far:
What was Richard I of England's occupation?
kings.
What happen in Sicily?
After the death of King William II of Sicily his cousin Tancred had seized power and had been crowned early in 1190 as King Tancred I of Sicily.
Are there any other interesting aspects about this article?
Tancred had imprisoned William's widow, Queen Joan, who was Richard's sister.
What happen after the imprisoned?
he demanded that his sister be released and given her inheritance; she was freed on 28 September, but without the inheritance.

Question: What did he do about not getting the inheritance?
Self-contained rewrite: What did Richard I do to get the inheritance?