What were the number of completions for James Vanderberg on Iowa when his yards were 45?
CREATE TABLE "passing_statistics" (
  "year" text,
  "team" text,
  "attempts" text,
  "completions" text,
  "completion_pct" text,
  "yards" text
);
SELECT "completions" FROM "passing_statistics" WHERE "team"='iowa' AND "yards"='45';