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. R. S. FOSTER and J. B. Lee, Surviving Members of a Partnership; d/b/a Foster-Grayson Lumber Company.
No. 14786.
United States Court of Appeals Eighth Circuit.
March 5, 1953.
David P. Findling, Associate General Counsel, National Labor Relations Board and A. Norman Somers, Asst. Gen. Counsel, National Labor Relations Board, Washington, D. C., for petitioner.
PER CURIAM.
Order of National Labor Relations Board enforced, on petition for enforcement, and stipulation filed with Board.

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