Table: wrestling_titles
Columns: championship
champion_s
previous_champion_s
date_won
location

Question: What tourmament has Genesis won previously?
SQL: SELECT "championship" FROM wrestling_titles WHERE "previous_champion_s" = 'Genesis'

Question: Who was the champion prior to Xix Xavant?
SQL: SELECT "previous_champion_s" FROM wrestling_titles WHERE "champion_s" = 'Xix Xavant'

Question: Who are the champions that have won at Aguas Buenas, Puerto Rico?
SQL: SELECT "champion_s" FROM wrestling_titles WHERE "location" = 'Aguas Buenas, Puerto Rico'