Given this paragraph about Michel Warschawski, tell me the two organizations that Warschawski led during his life.

Context: Michel Warschawski is an Israeli anti-Zionist activist. He led the Marxist Revolutionary Communist League until its demise in the 1990s, and founded the Alternative Information Center, a joint Palestinian-Israeli non-governmental organization, in 1984.

Answer: Michel Warschawski, an anti-Zionist activist, led the Marxist Revolutionary Communist League and later the Alternative Information Center.