Table: mma_fight_results_15
Columns: res
record
opponent
method
event
round
time
location

Question: Which Opponent has the Event of Sengoku 1?
SQL: SELECT "opponent" FROM mma_fight_results_15 WHERE "event" = 'sengoku 1'

Question: What Record has an Event of Pride Shockwave 2004?
SQL: SELECT "record" FROM mma_fight_results_15 WHERE "event" = 'pride shockwave 2004'