CREATE TABLE "reactors" (
  "unit" text,
  "reactor_type" text,
  "net_capacity" text,
  "gross_capacity" text,
  "construction_started" text,
  "electricity_grid" text,
  "commercial_operation" text,
  "shutdown" text
);

Question: What reactor type that has a commercial operation of —, and a tianwan-7 unit?
SQL: SELECT "reactor_type" FROM "reactors" WHERE "commercial_operation"='—' AND "unit"='tianwan-7';

Question: What was the net capacity with a gross capacity of 1,126 mw, and a Unit of tianwan-4?
SQL: SELECT "net_capacity" FROM "reactors" WHERE "gross_capacity"='1,126 mw' AND "unit"='tianwan-4';

Question: What commercial operation that has a gross capacity of 1,126 mw, and a unit of tianwan-4?
SQL: SELECT "commercial_operation" FROM "reactors" WHERE "gross_capacity"='1,126 mw' AND "unit"='tianwan-4';