C. A. 6th Cir. The order entered February 19, 1991 [498 U. S. 1082], is modified to read as follows: Certiorari granted limited to Question I presented by the petition. In addition, the parties are directed to brief and argue the following question: “Does §301 of the Labor Management Relations Act create a federal cause of action under which a union member may sue his union for violation of the union constitution?”