Complex sentence: The Classical or Capablanca Variation was popular in the early days of the Nimzo-Indian, and though eventually superseded by 4.e3 it was revived in the 1990s; it is now just as popular as the Rubinstein.
Split into simpler sentences: The Classical or Capablanca Variation was popular in the early days of the Nimzo-Indian, but was eventually superseded by 4.e3. However, it was revived in the 1990s and is now just as popular as the Rubinstein.