-- Database schema
| party : Party_ID [ INT ] primary_key , Party_Theme [ TEXT ] , Location [ TEXT ] , First_year [ TEXT ] , Last_year [ TEXT ] , Number_of_hosts [ INT ] | host : Host_ID [ INT ] primary_key , Name [ TEXT ] , Nationality [ TEXT ] , Age [ TEXT ] | party_host : Party_ID [ INT ] primary_key party_host.Party_ID = party.Party_ID , Host_ID [ INT ] party_host.Host_ID = host.Host_ID , Is_Main_in_Charge [ bool ] |
-- -- What are the names of hosts who did not host any party in our record?

SELECT Name FROM HOST WHERE Host_ID NOT IN (SELECT Host_ID FROM party_host);