Complex sentence: The document was largely forgotten for a long time, until it came into the limelight in the 1980s, when Indira Gandhi used it to depict the Akali Dal as a separatist party, and to present herself as the India's savior.
Split into simpler sentences: The document was largely forgotten for a long time, until it came into the limelight in the 1980s. She used it to depict the Akali Dal as a separatist party, and to present herself as the India's savior.