opinion: INTERNATIONAL ASSOCIATION OF HEAT & FROST INSULATORS AND ASBESTOS WORKERS, AFL-CIO, et al., Petitioners, v. NATIONAL LABOR RELATIONS BOARD, Respondent. NATIONAL LABOR RELATIONS BOARD, Petitioner, v. ALEXANDER STAFFORD CORPORATION, and The Master Insulators Association, Respondents.
  Nos. 14015, 14093.
  United States Court of Appeals District of Columbia Circuit.
  Argued April 3, 1958.
  Decided April 24, 1958.
  Mr. Carlton R. Sickles, Washington, D. C., for petitioners in No. 14,015.
  Mr. Owsley Vose, National Labor Relations Board, with whom Messrs. Thomas J. McDermott, Associate General Counsel, National Labor Relations Board, and Marcel Mallet-Prevost, Asst. Gen. Counsel, National Labor Relations Board, were on the brief, for respondent in No. 14,015 and for petitioner in No. 14,098. Mr. Stephen Leonard, Associate General Counsel, National Labor Relations Board, also entered an appearance for respondent in No. 14,015 and for petitioner in No. 14,093.
  No appearance was entered for respondents in No. 14,093.
  Before Wilbur K. Miller, Washington and Bastían, Circuit Judges.
  PER CURIAM.
  The petition to set aside the Board’s order in No. 14,015 should be denied and the Board’s petition for enforcement in No. 14,093 should be granted in accordance with the opinion of the National Labor Relations Board, 118 N.L.R.B. No. 14. We do not necessarily adopt all of the reasoning of the Board, particularly that regarding the liability of the International Union. We do, however, agree with the results reached.
  Petition denied in No. 14,015.
  Petition granted in No. 14,093.
instruction: What follows is an opinion from a United States Court of Appeals.
  Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
  When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 
  
  Your task concerns the first listed appellant. The nature of this litigant falls into the category "private organization or association", specifically "business, trade, professional, or union (BTPU)". Your task is to determine what subcategory of private association best describes this litigant.
choices: Business or trade association utilities co-ops Professional association - other than law or medicine Legal professional association Medical professional association AFL-CIO union (private) Other private union Private Union - unable to determine whether in AFL-CIO Public employee union- in AFL-CIO (include groups called professional organizations if their role includes bargaining over wages and work conditions) Public Employee Union - not in AFL-CIO Public Employee Union - unable to determine if in AFL-CIO Union pension fund; other union funds (e.g., vacation funds) Other Unclear