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 second listed appellant. The nature of this litigant falls into the category "private business (including criminal enterprises)". Your task is to determine what category of business best describes the area of activity of this litigant which is involved in this case.

Opinion:
Jose Adrian BARRAL and Gabriela Giralt, Appellants, v. UNITED STATES of America, Appellee.
No. 19723.
United States Court of Appeals Fifth Circuit.
Feb. 19, 1964.
Jack L. King, Miami, Fla., for appellants.
Daniel S. Pearson, Edward A. Kaufman, Asst. U. S. Attys., Miami, Fla., William A. Meadows, Jr., U. S. Atty., •S. D. of Fla., Miami, Fla., for appellee.
Before TUTTLE, Chief Judge, and JONES and BELL, Circuit Judges.
PER CURIAM.
Each of the several questions raised on this appeal by the appellants is answered contrary to their contentions by well-settled principles of law. No error is shown and the judgment of the district court is
Affirmed.

Question: This question concerns the second listed appellant. The nature of this litigant falls into the category "private business (including criminal enterprises)". What category of business best describes the area of activity of this litigant which is involved in this case?

Choices:
agriculture
mining
construction
manufacturing
transportation
trade
financial institution
utilities
other
unclear

Answer: 9