Name the report for per-viktor widengren and alfa romeo
CREATE TABLE "non_championship_grands_prix" (
  "name" text,
  "circuit" text,
  "date" text,
  "winning_driver" text,
  "winning_constructor" text,
  "report" text
);
SELECT "report" FROM "non_championship_grands_prix" WHERE "winning_driver"='per-viktor widengren' AND "winning_constructor"='alfa romeo';