Complex sentence: The tribe paid to fly him to Washington, D.C. to prepare the brief with Dan Israel of NARF and Bernie Becker, the tribe's attorney who would argue the case before the Supreme Court.
Split into simpler sentences: The tribe paid to fly him to Washington, D.C. to prepare the brief with Dan Israel of NARF and Bernie Becker, the tribe's attorney. Becker would argue the case before the Supreme Court.