What follows is an opinion from the Supreme Court of the United States. Your task is to identify the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed. The information relevant to this variable may be found near the end of the summary that begins on the title page of each case, or preferably at the very end of the opinion of the Court. For cases in which the Court granted a motion to dismiss, consider "petition denied or appeal dismissed". There is "no disposition" if the Court denied a motion to dismiss.

Opinion:
PENSION BENEFIT GUARANTY CORPORATION v. YAHN & McDONNELL, INC., et al.
No. 86-231.
Argued April 27, 1987
Decided May 18, 1987
Gary M. Ford argued the cause for appellants in both cases. With him on the briefs for appellant in No. 86-231 were Peter H. Gould, David F. Power, Kenneth S. Getter, Kathryn A. Oberly, and Mitchell L. Strickler. Richard H. Markowitz and Paula R. Markowitz filed briefs for appellants in No. 86-253.
Carl L. Taylor argued the cause for appellees in both cases. With him on the brief were Glenn Summers and William H. Ewing.
Together with No. 86-253, United Retail & Wholesale Employees Teamsters Union Local No. 115 Pension Plan et al. v. Yahn & McDonnell, Inc., et al., also on appeal from the same court.
Briefs of amici curiae urging reversal in No. 86-231 were filed for the National Coordinating Committee for Multiemployer Plans by Gerald M. Feder, David R. Levin, and Nik B. Edes; and for the Trustees of the United Mine Workers of America 1950 and 1974 Pension Plans by Israel Goldowitz.
Briefs of amici curiae urging affirmance in both cases were filed for the Chamber of Commerce of the United States by Stephen A. Bokat and Robin S. Conrad; and for Flying Tiger Line Inc., et al. by Douglas D. Broadwater, R. Franklin Balotti, Jesse A. Finkelstein, William W. Bowser, and Lawrence M. Nagin.
Per Curiam.
The judgment is affirmed by an equally divided Court.
Justice White took no part in the consideration or decision of these cases.

Question: What is the disposition of the case, that is, the treatment the Supreme Court accorded the court whose decision it reviewed?

Choices:
stay, petition, or motion granted
affirmed (includes modified)
reversed
reversed and remanded
vacated and remanded
affirmed and reversed (or vacated) in part
affirmed and reversed (or vacated) in part and remanded
vacated
petition denied or appeal dismissed
certification to or from a lower court
no disposition

Answer: 1