CREATE TABLE table_5928 ("Country" TEXT, "Project Name" TEXT, "Year startup" TEXT, "Operator" TEXT, "Peak" TEXT)

What was the startup year for the project with apache energy/inpex as the operator?
SELECT "Year startup" FROM table_5928 WHERE "Operator" = 'apache energy/inpex'
SELECT "Year startup" FROM "table_5928" WHERE "Operator" = 'apache energy/inpex'