We should not be providing autocomplete suggestions that aren't relevant to a query that a user has typed in the query bar. For example, if a user has typed more than a historic query (more fields or even just a comma), we should not provide the autocomplete suggestion. Also, we shouldn't provide historic queries as autocomplete suggestions that don't contain the fields that a user has typed so far.

The screenshots below provide examples of historic queries that should not be given as autocomplete suggestions. 

None of the suggestions are relevant: 

Only the query containing "cuisine" and "borough" fields should be included: