CREATE TABLE table_35064 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" FLOAT, "Time" CLOB, "Location" CLOB)

Which Opponent has the Event of Sengoku 1?
SELECT "Opponent" FROM table_35064 WHERE "Event" = 'sengoku 1'
SELECT "Opponent" FROM "table_35064" WHERE "Event" = 'sengoku 1'