Give me more for this agreement: FIRST AMENDMENT TO SAGEBRUSH MANAGEMENT AND MAINTENANCE AGREEMENT
 THIS FIRST AMENDMENT TO SAGEBRUSH MANAGEMENT AND MAINTENANCE AGREEMENT ("Amendment") is made and entered into as of December 1, 1990 by and among Sagebrush, a California general partnership ("Partnership"), the undersigned partners of the Partnership, being all of the Sagebrush partners ("Partners"), and ToyoWest Management Inc., a California corporation ("Manager"), with respect to the following facts and circumstances:
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 A. The Partnership, all of the Partners except Alpha Mariah (Prime), Inc. and Beta Mariah (Prime) Inc., and Manager entered into that certain Sagebrush Management and Maintenance Agreement, dated as of September 1, 1989 (the "Agreement").
 B. Concurrently herewith, all of the Partners are entering into a First Amendment to Second Amended and Restated Sagebrush General Co-Ownership Partnership Agreement, by which the Partners agree, among other things, that Alpha Mariah (Prime), Inc. and Beta Mariah (Prime), Inc. are admitted to the Partnership.