Complex sentence: She stopped painting altogether after the eruption of the Cultural Revolution in 1966, and became gradually forgotten by the Chinese public, although her "Portrait of Miss L." was selected for exhibition at the Guggenheim Museum in New York City in 1998.
Split into simpler sentences: She stopped painting altogether after the eruption of the Cultural Revolution in 1966. She was gradually forgotten by the Chinese public, although her "Portrait of Miss L." was selected for exhibition at the Guggenheim Museum in New York City in 1998.