What follows is an opinion from a United States Court of Appeals. Your task is to identify the federal agency (if any) whose decision was reviewed by the court of appeals. If there was no prior agency action, choose "not applicable".

Opinion:
NATIONAL LABOR RELATIONS BOARD, Petitioner, v. ELLENVILLE HANDLE WORKS, INC., Respondent.
No. 453, Docket 28689.
United States Court of Appeals Second Circuit.
Argued April 30, 1964.
Decided May 4, 1964.
Duane R. Batista, N. L. R. B., Washington, D. C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Melvin J. Welles, Atty., N. L. R. B., Washington, D. C., on the brief), for petitioner.
Francis B. Conrad, New York City, for respondent.
Before LUMBARD, Chief Judge, and MOORE and SMITH, Circuit Judges.
PER CURIAM:
As the record amply supports the Board’s decision which affirmed the Trial Examiner’s Intermediate Report and adopted his findings and conclusions that the respondent had violated §§ 8(a) (1) and 8(a) (3) and (1) of the National Labor Relations Act, 29 U.S.C. § 151 et seq., and his recommendation, with one amendment, 142 NLRB No. 92, and as the proposed order is in all respects appropriate, we grant enforcement of the Board’s order

Question: What federal agency's decision was reviewed by the court of appeals?

Choices:
Benefits Review Board
Civil Aeronautics Board
Civil Service Commission
Federal Communications Commission
Federal Energy Regulatory Commission
Federal Power Commission
Federal Maritime Commission
Federal Trade Commission
Interstate Commerce Commission
National Labor Relations Board
Atomic Energy Commission
Nuclear Regulatory Commission
Securities & Exchange Commission
Other federal agency
Not ascertained or not applicable

Answer: 9