Conversation so far:
what is the crime rate in san francisco
With a crime rate of 64 per one thousand residents, San Francisco has one of the highest crime rates in America compared to all communities of all sizes.
what's the chance of being a victim of crime in san francisco
One's chance of becoming a victim of either violent or property crime here is one in 16.

Question: what is the city's crime index
Self-contained rewrite: what is san francisco's crime index