Possible Clues:

• '70s extremist gp
• Gp. that kidnapped Patty Hearst
• Radical '70s org
• Patty Hearst kidnap grp.
• P. Hearst captors
• '70s radical gp
• 1974 kidnap grp.
• 1970s radical gp.
• Patty Hearst's abductors: Abbr
• Hearst's kidnappers: Abbr.