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. NEWTON FALLS PAPER MILL, INC., Respondent.
No. 128, Docket 28968.
United States Court of Appeals Second Circuit.
Argued Oct. 29, 1964.
Decided Oct. 29, 1964.
Anthony J. Obadal, National Labor Relations Board, Washington, D. C. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Assistant General Counsel, and Warren M. Davison, National Labor Relations Board, Washington, D. C., on the brief), for petitioner.
Edward F. Callan, New York City (Thomas J. Winans, and Putney, Twombly, Hall & Skidmore, New York City, on the brief), for respondent.
Before LUMBARD, Chief Judge, and HAYS and MARSHALL, Circuit Judges.
PER CURIAM:
In open court we grant enforcement of the Board’s order reported at 144 NLRB No. 144 (1963).

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